Disable Multiple Monitor Window Snap Feature

I am using a Precision 7720 laptop and have a docking station with three monitors attached to it. When I move a window a snap feature pops up (showing all three screens) along the top, on whichever screen I am currently using. If I release the mouse over one of these windows it automatically puts the window I'm moving onto that monitor and maximizes it. Is there any way to disable this snap feature. I've already disabled aero snap on my computer but this has not helped. 

Thank you for any help you can provide.