My skin is Pix Office from the full Pix Office suite.
Yes, my 2 screens appear as 2 screens in display properties. Actually, 3 appear because I also have MaxiVista (a third party product) installed for a third 1600x1200 display (monitor # 3, positioned to the far left, running on another laptop). So my Display properties' display positioning configuration is 3 on left, 1 in middle, and 2 on right, with 3 and 1 being 1600x1200 while display 2 is 1680x1050, and displays 3 and 2 are positioned to the left and right (respectively) of #1 but about 300 pixels lowered since #3 and #2 are both laptops and #1 is a desktop LCD on a taller mount.
Generally, MaxiVista is turned off and displays #1 and #2 "drive the show". The reported problem is when dragging a window from display #1 to display #2 and maximizing it. I haven't really had any issues with maximizing windows with MaxiVista or otherwise secondary monitors thrown in the mix, except for Citrix windows refusing to maximize in the secondary display, until now with WB5 freshly installed.