When I maximize a window, it goes to the wrong one of my dual screens

view story

http://askubuntu.com – Example: From http://www.thedailyshow.com/, I try to watch the most recent episode. When I click on the icon to maximize the video, the maximized video shoots over to my little laptop monitor, and I can't get it to stay on my nice big monitor. Question: How can I instruct the video to maximize in my screen of choice (without going and changing my dual screen settings to simply mirror)? Setup: Dual screen. Screen #1 is my System76 Lemur running Ubuntu Unity 12.10. Screen #2 is connected via hdmi/dvi (adapter) to a new Dell monitor. (HowTos)