Not sure what you mean ‘under the same aux in Betaflight’. I would two separate switches on your transmitter and two separate aux switches in the Betaflight tab as you don’t want to accidentally engage gps rescue whilst trying to turtle mode.
As for the drifting in flight, have you adjusted your endpoints on your transmitter? Like this:
[MEDIA=youtube]UF9zp8pFQeg[/MEDIA]
Are you sure your transmitter inputs are exactly the same as those in Betaflight? So when you use pitch forward on your transmitter, are you seeing pitch move in Betaflight? It is easy to set the wrong mapping in Betaflight, so instead of AETR you may have it set to TAER.
