what's up mate I thought you had the self level set up in there, have you got it set up in one of your banks and do you have a switch assigned to the bank switching.
the self level uses the accelerometers to work the gyro uses the gyro sensors, the accelerometers are freaking sensitive as you found out,
you will need to set it up see where it moves when you flick the switch and adjust that out in the advanced menus.
let us know what you need to set up exactly and we will point you in the right direction mate,