I hav reported this on the Marianas Map Bugs & Issues as well.
I have found the following issue with the controls for the Mosquito on the Marianas Map. These issues do not exist on the other maps and so I conclude they are unique to the Marianas map:
Mosquito: There appears to be a swapping of inputs when using a HOTAS (I don't use keyboard so I can't comment on this). The axis on my throttle which controls pitch operates the rudder and a mini-joystick on the throttle moves the primary controls. Checking the Adjust Controls tab shows that these are mapped correctly (pirch control shows as pitch, etc.) and remapping them makes no difference.
I have tried restarting the computer and repairing my DCS (Open beta) with neither fixing the problem.
I have not tested other aircraft on the map so I don't know if the issue is limited to the Mosquito (and a more limited one with the Viggen).