It appears that although the plugin allows for addition of more than one device, it doesn't differentiate between the devices - the accessories are just called "door" "light" etc. and as such only one of the 2 devices shows up in homebridge.
Can see the the two devices appear to be discovered with same names for the accessories -- As a test I did successfully import both into Home Assistant, and exposed them to Homekit successfully...
from @edrikk