Jumper T8SG DSMX MS

Hello all! Let me first say thank you for the amount of work that everyone involved in this open source software has done.
Second, I have zero clue what any of it means, I've tried to search for the answers to the questions I currently have but I'm pretty sure I may lack proper terminology.

I currently am attempting to use the Jumper T8SG Plus on some Spectrum DSMX 2048 recievers (I do not even know what that really means but that is what they are).
I am using them on on quadcopters using Betaflight. Apparently, it matters what frame rates the transmitter is working on, 22 or 11ms.
Would someone happen to know?
t8sg_v2_plus_v5.x.x-2018-04-19

The copter is bound and fly but there is something going on and I need to rule this out to continue.

My second question: On Inductrix FPV (different copter), how do I assign a switch to change flight modes. A Spectrum transmitter uses a "gear" switch but I do not know how to make one. I am able to get all switches and dials to operate but not knowing the correct parameters/values, I'll never find the right combo.

Thank you for any input