With 2 displays, a dock that I have configured on the left edge of the rightmost display, appears on the right edge of the leftmost display when the dock is auto-hidden. (I also have docks on the bottom and right edges of the rightmost display.)
I am using the Version 2 beta of ObjectDock Plus on a quad-core notebook running Windows 7 Professional 64bit with 8GB RAM. I run in dual monitor mode with an external LCD monitor as my primary right side display and notebook display as the left display. I use the Classic Windows theme - NOT the new Aero.
Jerry