Sorry guys, I encountered new issues on the same thing :
1. the card number config was not persistent after an unplug of battery power
I changed the hw:0 by hw:1 in the audio web config, in advanced fields, and now it’s persistent at each boot 
2. the screen calibration is not persistent after a simple reboot
I didn’t read the topic till the end … I have the same issue.
I tried to make the calibration script launched at startup with crontab and rc.local but without success 
BR,
Uru