MFU controls are backwards!?

[Stickman]

I can't seem to get my MFU to function right. It steers and shifts fine, but the throttle and horns are backwards. When I move the left stick up/down it honks the horn. When I move the right stick up/down it controls the throttle. The side to side functions work like they should on the correct sticks. I have reprogrammed the MFU many times with the same results.
Left stick up/down right/left
Right stick up/down right left
The radio is a Futaba 4YF-2.4GHz if that helps. This is my first build, so I feal like I am missing something simple. Any ideas?