The so-called custom variable
bagType define which bags should be addressed by a plugin. In _Pernobilis it is defined in lines 111 to 116, directly before the space-indicator.
The default here is "bags", so using bagIDs 1 to 4. You can however replace it by "backpack+bags" to get 0 to 4. Same goes for bank which can also be replaced by "bankframe+bank".
Seems like it's an error and I will fix it in the next version.