I have tried to reproduce what the problem is, but I can not. May be I have not understood the problem, sorry.
But in general, please check the original configuration for corresponding switches. It is not just changing one state. Look for example "(Ch: 1 N:80) Bus :", which switch to the bus mode. In addition to CtrlGroup change, it also set WAI and update display.
The original Pan also operate with AssignMode (and EQMode), following what the original plug-in was doing.
You can "Play" original buttons definitions from the Logic Tab (without any particular action selected, it plays the whole list). If you find some sequence which produce unexpected result, please let me know and I will fix it. If original lists are working fine, check what actions you are missing.
In fact, "display" part should be reworked. Unlike buttons, it is extreme complicated mostly in (unsuccessful) attempt to trick TouchDAW. I have introduced some changes to make it simpler (and more transparent) but I have not updated the plug-in yet.