Did you use it with clutch?
Also, why did you make 2 threads? just could've posted it here or bugs

Yes u can, I assume u r driving with FBM, release throttle before shifting up

If you are using a sequential shifter you have to assign it to gear up/gear down. It looks to me that you assigned it to the shifter positions, and that's why you can only select those 2 gears.