I have found that my controllers needed a three step process to get calibration and sensitivity working acurately. Not all of them - but some did:
Step 1)
Plug your joystick in.
Make sure windows can see it as a game controller.
Calibrate it within the usb gaming controller applet in windows.
Step 2)
Start up MFS
Go to Options - Controls
You will see your joystick listed (it may be fully bound or blank depending which joystick type it is)
If it hasn’t got any buttons or axis bound, make a drink and spend a few minutes assigning all you require!
Step 3)
Go to Sensitivity and play with those values (You will almost definately want to dial back some of the axis as you can see from your pitch axis!)
Step 4) I forgot step 4 
Repeat Step 3 until your happy with the response.