Windows 7 Alignment of 3rd Monitor

[cmills911]

I use a laptop for work but I have 3 monitors that I use and I don't use the laptop screen. All monitors are identical and set to the same resolution. My 3rd monitor doesn't line up properly; when I scroll over to it the mouse jumps below where it was on the previous screen. When I go into display settings the only monitors shown are 2 of the regular ones plus the laptop monitor.

Is there anyway to fix this?

Chris