Too much timing???

Good idea. I'm sure I can get it to work that way. Do I need to worry or try to figure out why it is changing? or is it even too high? I live at 5000 ft elevation and run most the time between 4200 to 4800 elevation.

You need to figure out why it is moving.

After that, do a little testing and see what it wants for total. As I have said, that advance mech is very simple. It may be that some corrosion has built up on the counterweights or maybe it needs a clean and lube.