I've played nearly all TTG games since they started years ago, and while the games themselves were good, they have often been marred by little annoyances like bad audio quality for voices or lackluster settings screens which don't provide all the essential settings which just about any other game in the market offers (though they've gotten a bit better in this department lately, just not good enough, it seems).
In this case, you can fix this problem with a $10 third party tool called XPadder:
http://xpadder.com/
With that tool you'll be able to reconfigure your gamepad to your liking (ANY gamepad, not just the XBox 360 controller; I don't know why every developer now assumes that PC gamers will only use the 360 controller).
I know we shouldn't have to spend extra to fix a problem that shouldn't be there to begin with, but at least there's an option, and that program is worth every penny, not just for this game, but for a lot of PC games which do not have proper gamepad support, since it allows you to configure your gamepad to press any key in the keyboard, or mouse button, or simulate mouse movement with the sticks. It works great every time (I don't have any affiliation with the author of that program; I'm just a happy customer

).