Mav.parm question

In order to start the SITL in GUIDED mode, in mavproxy I used

param set INITIAL_MODE 4

yet the sim_vehicle still starts in stabilize mode (“0”), even though

param show INITIAL_MODE

shows 4. What’s the deal?

Also, I tried

sudo nano mav.parm

to set it that way, but no luck. Yes, I did reboot. Some unknown code force at work?

Regarding copter parameters, is there a listing of default values? Would it have been helpful to include a column for that in this param listing?