Im not too sure whats causing it, but its really annoying.

im running a dual box Left/Right split on a 24 inch monitor.


what my problem is , when im switching between the 2 windows the mouse defaults back to the window i left from once i click...

example..

Left - Right click BG Npc - window opens up for Join queue.
Right - right click bg npc - mouse jumps back to left screen and did not click the right one.. move over to the right again click.. jumps back over to the left.

How do i stop the mouse from jumping back to the previous screen everytime i click on the other one?