it's possible the effects you are seeing are due to having the trimfeedback effects set... i noticed when i did that, i really had to fight the stick. try turning down/off the forces on trim. i only have stall and buffets enbaled on my stick, and do not use the SW profiling software at all.
on the other hand, i can't seem to get buttons 7 and 8 to be recognized by the game, selecting joystcik shows it as the basic ms FF stick, not the FFB2, which is almost exactly like the prec pro in terms of buttons.