Odd. I've never had a problem with that. I set my phones up in the switch and then take them out in the field and deploy them and I've never had an issue. I have phones in my system that say they should have a sidecar and don't, and I have occasionally added a sidecar and forgot to change the device type and wondered why it wouldn't let me program it! I know when our system was first generated it did stupid things like make up its own Device Combinations if it found phones that didn't fit any of the ones that were already there, and then I had to go back later and clean that up. I've never had one change from what I set it to.
I would suggest after you make a number of changes in a day to do EXE-UPDAT:BP,All; twice, and EXE-UPDAT:A1,ALL; twice to be sure your changes are saved. That normally happens at 2AM anyway, but it never hurts after you make a bunch of changes.
Don Bruechert, Voice Comm Analyst II
CareTech Solutions @ Holy Family Memorial
Manitowoc, WI, USA