im running at 1680 x 1050

last night i was playing around with maximizer and couldnt get around a problem.

i had my main screen set to f1 running just under 1680 x 1050 and the other 2 screen at smaller res on f2 and f3

when i switched the smaller screens to appear as my main they would be in an odd resolution the main character would appear squashed.

what im i doing wrong ???