Problems with category import/creation/remapping in magmi

[CrazyBeardedGuy]

Importing products to magento 2.1.8 using magmi 0.7.23-git, all seems to go well except for category remapping. I am importing between 9000 and 20000 products per vendor, currently from 9 vendors, sorting into 4 main categories and approximately 200 subcategories. Also this will be a multistore setup, so I am taking that into account from the start. Ultimately my categories_map.csv should hold the values to map all of the vendors' categories into my own.

For example, this vendor file has column 'classification' which I've remapped with column mapper to 'categories' to work with category importer/creator plugin. Then using ValueReplacer I attempt to reassign vendor 'classification' values to 'categories' using a csv file. The expected result is 'Wire' is translated to [Default Category]/Interior/Wiring and [Default Category]/Under the Hood/Wiring, but the returned result is [Default Category]/Wire.

My ValueReplacer statement for the 'categories' column is:

{{ ValueRemapper::use_csv('/var/www/magento/var/import/categories_map.csv')->mapmulti({item.categories},'/') }}

and my csv looks like this:

12Volt Mobile Video;[Default Category]/Interior/Video
12Volt Multimedia;[Default Category]/Interior/Audio/Multimedia;;[Default Category]/Interior/Video/Multimedia
2 - Way Radios;[Default Category]/Interior/Safety/CB & 2-Way Radios
Action Camera;[Default Category]/Gear/Personal Electronics/Cameras
Alarm Accessory;[Default Category]/Interior/Security & Convenience/Alarms/Accessoriez
Amplifier;[Default Category]/Interior/Audio/Amplifiers
Amplifier Kit;[Default Category]/Interior/Audio/Amplifiers/Accessoriez/Amplifier Kits;;[Default Category]/Interior/Wiring/Amplifier Kits
Appliance;[Default Category]/In the Garage/Appliances
ATV - Motorcycle;[Default Category]/In the Garage/ATV UTV & Motorcycles
Auto Lighting;[Default Category]/Lighting
Auto Supplies;[Default Category]/In the Garage/Automotive/Supplies
Automotive;[Default Category]/In the Garage/Automotive
Batteries;[Default Category]/Under the Hood/Batteries
Bluetooth Access;[Default Category]/Interior/Audio/Bluetooth Accessoriez;;[Default Category]/In the Garage/Personal     Electronics/Bluetooth Accessoriez;;[Default Category]/Interior/Safety/Bluetooth Accessoriez
Bluetooth Headphones;[Default Category]/Interior/Audio/Bluetooth Accessoriez;;[Default Category]/In the Garage/Personal Electronics/Bluetooth Accessoriez
Bluetooth Headphones;[Default Category]/Interior/Safety/Bluetooth Accessoriez/Headphones
Bluetooth Speakers;[Default Category]/Interior/Audio/Bluetooth Accessoriez;;[Default Category]/In the Garage/Personal Electronics/Bluetooth Accessoriez;;[Default Category]/Interior/Safety/Bluetooth Accessoriez/Speakers
Car Wiring Harness;[Default Category]/Category/Interior/Audio/Wiring;;[Default Category]/Interior/Wiring
CB Radio;[Default Category]/Interior/Safety/CB & 2-Way Radios/CB
CD Player;[Default Category]/Interior/Audio/CD Players
Cell Phone Accessory;[Default Category]/Interior/Safety/Cell Phone Accessoriez;;[Default Category]/In the Garage/Personal Electronics/Cell Phones/Accessoriez
Component Speakers;[Default Category]/Interior/Audio/Speakers/Components
DVD Players;[Default Category]/Interior/Video/DVD Players
Empty Boxes - Tube;[Default Category]/Interior/Audio/Subwoofer Enclosures/Tubes/Empty
EQ - Crossover;[Default Category]/Interior/Audio/Equalizers & Crossovers
FanMat;[Default Category]/Interior/Floormats
Hand Tools;[Default Category]/In the Garage/Tools/Hand Tools
Headphone;[Default Category]/In the Garage/Personal Electronics/Headphones
Health & Fitness;[Default Category]/In the Garage/Health & Fitness
HID Kits;[Default Category]/Lighting/HID;;[Default Category]/Exterior/Lighting/HID
Home & Garden;[Default Category]/In the Garage/Home & Garden
Home Lighting;[Default Category]/In the Garage/Home Lighting
Home Security;[Default Category]/In the Garage/Home Security
Home Theater;[Default Category]/In the Garage/Man Caves/Home Theater
Installation Access.;[Default Category]/Interior/Audio/Installation/Accessoriez
Installation Kit;[Default Category]/Interior/Audio/Installation/Kits
iPod Accessories;[Default Category]/Interior/Safety/iPod & iPhone Accessoriez
iPod Accessories;[Default Category]/In the Garage/Personal Electronics/iPod & iPhone/Accessoriez
Knife;[Default Category]/In the Garage/Tools/Knives;;[Default Category]/In the Garage/Sporting Goods/Knives
LED and Accessories;[Default Category]/Lighting/LED
LED Light Bar;[Default Category]/Lighting/LED/Light Bars;;[Default Category]/Exterior/Lighting/LED/Light Bars
Literature - POP;[Default Category]/Training
Marine;[Default Category]/In the Garage/Marine
Mechless Radio;[Default Category]/Interior/Audio/Multimedia
Megaphone;[Default Category]/In the Garage/Personal Electronics/Megaphones
Midbass & Midranges;[Default Category]/Interior/audio/Speakers/Midbass & Midranges
Mobile Video Access.;[Default Category]/Interior/Video/Accessoriez
Msc. Merchandise;[Default Category]/Gear/Miscellaneous
Navigation;[Default Category]/Interior/GPS & Navigation;;[Default Category]/Interior/Safety/GPS & Navigation
Office Supplies;[Default Category]/In the Garage/Home Office/Office Supplies
Parking System;[Default Category]/Interior/Safety/Parking Systems;;[Default Category]/Exterior/Safety/Parking Systems
Personal MP3 Player;[Default Category]/In the Garage/Personal Electronics/Mp3 Players
Pet Supplies;[Default Category]/In the Garage/Pet Supplies
Portable;[Default Category]/In the Garage/Personal Electronics/Portable Devices
Power Inverter;[Default Category]/Interior/Wiring/Power Inverters;;[Default Category]/In the Garage/Solar/Power Inverters
Power Supply;[Default Category]/In the Garage/Automotive/Power Supplies;;[Default Category]/In the Garage/Tools/Equipment
Power Tools;[Default Category]/In the Garage/Tools/Power Tools
Prof. Audio Equip.;[Default Category]/In the Garage/Man Caves/Professional Audio & DJ
Radar Detector;[Default Category]/Interior/Security & Convenience/Radar & Laser Detectors
RCA Cable;[Default Category]/Interior/Wiring/RCA Cables;;[Default Category]/Interior/Audio/Wiring/RCA Cables;;[Default Category]/In the     Garage/Man Caves/Home Theater/Accessoriez
Remote Bass Boost;[Default Category]/Interior/Audio/Amplifiers/Accessoriez/Bass Boost & Gain Controls
Remote Car Starter;[Default Category]/Interior/Security & Convenience/Remote Start & Keyless Entry
Satellite Radio;[Default Category]/Interior/Audio/Satellite Radio
Scanner;[Default Category]/Interior/Safety/CB & 2-Way Radios/Scanners
Self Defense;[Default Category]/Interior/Safety/Self Defense
Sound Deadening;[Default Category]/Interior/Sound Deadening;;[Default Category]/Interior/Audio/Accessoriez/Sound Deadening
Speaker;[Default Category]/Interior/Audio/Speakers
Sporting Goods;[Default Category]/In the Garage/Sporting Goods
Stiffening Capacitor;[Default Category]/Interior/Audio/Amplifiers/accessoriez/Stiffening Capacitors
Tablets;[Default Category]/In the Garage/Personal Electronics/Tablets;;[Default Category]/In the Garage/Home Office/Tablets
Tarps;[Default Category]/In the Garage/Tools/Tarps;;[Default Category]/In the Garage/Home & Garden/Tarps
Tool Access;[Default Category]/In the Garage/Tools/Storage & Accessoriez
Tweeter;[Default Category]/Interior/Audio/Speakers/Tweeters
Vehicle Alarm System;[Default Category]/Interior/Security & Convenience/Alarms
Window Tint;[Default Category]/Interior/Security & Convenience/Window             Tint;;[Default Category]/Exterior/Window Tint
Wire;[Default Category]/Interior/Audio/Wiring;;[Default Category]/Interior/Wiring;;[Default Category]/Under the Hood/Wiring
Woofer;[Default Category]/Interior/Audio/Speakers/Woofers & Subwoofers
Woofer Boxes - Tube;[Default Category]/Interior/Audio/Subwoofer Enclosures
Woofer Grill;[Default Category]/Interior/Audio/Subwoofer Enclosures/Accessoriez/Grilles