PS3 controller's, well, controls:

[MOZZYSTAR]

Checking it out now, Squa11. Unfortunately, I'm having issues again. (After uninstalling and re-installing everything (excluding the game). I'm getting a bit fed up with this.) Hoping this works! Cheers.

EDIT: So... it ended up being something as simple as the aforementioned. Of course, right? Ha ha... So if anyone has a similar problem: I suggest calibrating through the game's system configuration itself.

Thank you everyone for your patience and for trying to help me out. I'm amazed at how helpful this community is.