There is an issue with the latest versions of INav that doesn't apply the custom mix when you select a preset Derek.
You may have to find and enter a custom mix in the CLI.
Don't worry, I have done it already, it's not that hard, I can get you through it.
Really windy over the weekend here but I couldn't wait, I flew mine.
RCX 250 Minquad FPV addiction
500 X quad FPV/AP platform
450 X quad set up for night flight
Multiple WLToys V911, V949, V959
Taranis, Turnigy 9X
Fatshark Predator, Immersion 5800 Duo
Trex 500 Esky Belt CP V2
Go to the CLI , type smix and press enter and you should see a bunch of numbers.
If you see nothing there is no mix so you need to set it up manually.
RCX 250 Minquad FPV addiction
500 X quad FPV/AP platform
450 X quad set up for night flight
Multiple WLToys V911, V949, V959
Taranis, Turnigy 9X
Fatshark Predator, Immersion 5800 Duo
Trex 500 Esky Belt CP V2