Totally confused!!!!

[adonys]

I've seen such behavior, though not in IL2, but in some other games, when a controller was active and that game was somehow receiving input from the controller's stick (for example in Skyrim with my joystick plugged in, Skyrim would continuously receive an UP command from the Joystick, making the use of keyboard/mouse to navigate through the menu's unusable.

so, it might be either one of the following:
1) you have different game axes/commands mapped to the same joystick axe (for example both up and down mapped on the same joystick up axis), or different commands mapped to some joystik axes without you being aware of any of these (like throttle down on mapped on the joystick up axis, etc) -> reset your configuration to default, then browse through the controls, and check that ALL commands mapped to any joystick axes is mapped correctly
2) you have an additional controller active (like a gamepad or something), and that is providing input without you being aware of it -> disable/unplug all the other controllers you have (gamepads, trackballs, etc)
3) your joystick might be broken -> check everything's all right with it in device's Properties panel

have fun