2nd monitor virtual machine duplicates and I can't remove duplicates

Just upgraded to version 8 and now I can't have different virtual machines on different desktops on an extended desktop on the second screen. I have the macbook air as the first screen, and a large screen for a second screen. So that gives me two desktops. Now when I add a desktop on my MAC, in fact I add several logical desktops, and then I would open each virtual machine, such as win7, xp, win8 and sometimes Linux Mint Maya; in the past I would move each Virtual Machine (different OS) to the big screen and have one in each logical desktop. Now, under version 8 of Parallels, it is duplicating each virtual machine on all the logical desktops, so if I have three logical desktops in addition to the first Apple desktop, I will have (take win7 for example), as I swipe sideways to roll to the next logical desktop, there is win7 again, and again, and again.

How do I get just one different virtual machine on each logical desktop?

Thanks,

Robin