ue3 gears of war editor runs dual span now?

ok i just got a new 8800gt msi card today,
im just testing out things to make sure they work correct,
so i went and loaded up a small room i made in ue3 gow editor,
something i have been working on,
but anyways now when i test it out the screen isnt small any longer,
it runs cross both my monitors,
like its trying to run dual in the middle or something,
i went and tried out ut3 ue3 editor and works just fine when i test a map out,
what im trying to explain is the test level in editor on gow is expanding into 2 monitors it never use to do this back on my 7600 card,
ive even tried messing with the setting in the game to see if that would help,
anyone had this issue,
Thanks,Chris

ok here are 2 screen shots i took,
1st being gears of war editor with it messed up in 2 monitors,
the spilt is on the lights were my 2nd monitor starts at,
the 2nd screen shot is ut3 ue3 editor the way it should look and it works just fine,
http://s239.photobucket.com/albums/ff64/chinese_lover/?action=view&current=gow_ue3_01.jpg
http://s239.photobucket.com/albums/ff64/chinese_lover/?action=view&current=ut3_ue3_01.jpg