Weied video problem

[bryant]

The last gig I was moving my singers screen over to the second monitor after resizing it to near full screen. But when I double clicked on it when in the second monitor it formed a half-width sized singers' display screen back on the first monitor with nothing into the second. (My workaround has been simply to not double click on it to full screen it).

What the heck would create this? Are certain display settings or combinations of display settings allowed?