Mouse Y-axis slanted

[Llamacornz]

I have had a Logitech G700s for almost 2 years (about 23 months). It is a great mouse but I have run into a problem recently. Whenever I move the mouse down on the Y-axis, the cursor movement is slanted slightly to the right. I am not sure what the issue is. I have reinstalled the drivers, replaced the batteries, and tried to clean the laser. I know my mousepad is not an issue because my other mice work fine on it. I opened up paint to show the issue compared to one of my other budget mice. Any help is appreciated. Example

 

[popatim]

I have this same mouse for about a month now, i thought it was just my hand drifting...
Now I will have to test even more. LoL