Inverted aim issue

[J.S.]

I'm having an issue with aiming in MTA on my new computer. I play pretty much everything inverted, so naturally I've set MTA to invert the camera. This works fine, up is down, down is up. The issue comes in any time I aim - it does not invert like the camera, so regardless of my invert setting, up is still up, down is still down. Surprisingly enough it actually makes shooting extremely difficult.

Here is my MTADiag: http://pastebin.mtasa.com/660995020

My specs are as follows:

Intel Core2 Quad 2.4ghz (4 cores)

8 GB RAM (only 4GB is useable at the moment because I installed 32 bit Windows by mistake)

Nvidia GeForce 8800 GT (512 mb video memory)

Windows 8.0 Professional, 32-bit

I think it may have something to do with the game's interaction with the processor, as my old computer was running Windows 8.0 on a single-core Pentium 4 and did not have this issue. I did try to set the process' affinity to 0, but it did not solve the issue.

[ccw]

Does GTA single player do the same thing?