I am one of the Helper's on this server, and I am not sure if it is your mod which is causing the issue, or the other mod QuantumStorage, but the issue is a dupe bug. When you use a moving wand on a QuantumStorage tank, it duplicates and you get one extra back. I can't really give you to much more info the person who found the bug submitted it as a ticket and I told him or her, that one of the mod devs needed to fix it. Only other thing I can give you is the Forge Version, and your mod version as well as the other mod's version if you'd like to try and replicate it.
Forge Version- 12.18.3.2185
NotEnoughWands- 1.10-1.4.0
QuantumStorage- 1.10.2-3.77
I am one of the Helper's on this server, and I am not sure if it is your mod which is causing the issue, or the other mod QuantumStorage, but the issue is a dupe bug. When you use a moving wand on a QuantumStorage tank, it duplicates and you get one extra back. I can't really give you to much more info the person who found the bug submitted it as a ticket and I told him or her, that one of the mod devs needed to fix it. Only other thing I can give you is the Forge Version, and your mod version as well as the other mod's version if you'd like to try and replicate it. Forge Version- 12.18.3.2185 NotEnoughWands- 1.10-1.4.0 QuantumStorage- 1.10.2-3.77