X-Box 360 Dual-Analog issue

I'm really liking this demo, but I have one tiny issue with it. I can't seem to get my analog sticks configured properly to work with the game. I've run the in-game configuration several times, but I think this must have something to do with the controller's setup (beyond what I am able to configure), as I've had this sort of trouble with other games.

The left stick works just fine. Nikodemos runs in whatever direction I tell him to.

The right stick is where the problems are.
"Up" shoots to the right.
"Up-right" shoots the down-left.
"Right" shoots down.
"Down-right" works fine.
"Down" shoots to the left.
"Down-left" shoots to the up-right.
"Left" shoots up.
"Up-left" works just fine.

I don't know if this info will help or is needed, but when I go "Control Panel" -> "Game Controllers" -> "XBOX 360 for Windows (Controller)" -> "Properties" -> "Settings" -> "Calibrate" it these are the buttons I use for different... (I don't really know enough computer terms to describe it...) things.

For calibrating the "X Axis/Y Axis", I use the left Joystick. There's a dot in the center of a box, and when I move the joystick, it moves around the box, forming a circular pattern. No problem with this in the game, but I thought this might be relevant information.

Then it brings me to the "Z Axis" configuration section. There's a long, horizontal rectangle with the left half filled up by a blue bar. When I press the RT (right trigger?) down slowly, the box shrinks to the left. When I release that, it expands back to the middle. When I press the LT, the blue bar expands all the way to the right. When I release that, it centers again.

The next section is "X Rotation". There's the gray box with the blue bar, just like on the "Z Axis" section. Moving the right stick left reduces teh blue bar to the left. Moving it right expands the blue bar all the way to the right. The up and down movement doesn't seem to affect this.

After that s the "Y Rotation" section. There's the same box and same blue bar. Moving the stick up shrinks the blue bar to the left, and pushing it down makes it expand all the way to the right.

Then that's the end of the calibration.

I can probably get by without this. I've been playing the demo using the A, B, X, and Y buttons for directions, but it'd be nice to get the Robotron-esque controls working.