You won't believe this, but I've never had that issue SINCE I left XP and went to 7 & 8
If it's a wireless printer, burn it - they almost always need reinstalling every time you use them and should be the first against the wall when the revolution comes. Otherwise your experience is quite ... alarming.
That seems odd. So I imagine it must offer the extended screen as a different adapter? So you would need to open that too and create a second viewport there? Or does DX fall over when dealing with VP's across multiple adapters?
Combined with windows + up key and "throwing a window to the top with the mouse", the BEST thing to happen to Windows ever. It's the little things...