you had the window selected when you hit 6 of course??
maybe swing the picture around the Y axis 180 degrees (though it shouldn't matter??)
Im guessing, but one thing is for sure, its something simple you have missed, whether you 'paid' for maya or not, this shouldnt happen.
(' not in other versions, ' how many you paid for LOL)
anyone with more suggestions??
you dont need divisions on an image plane.
take it easy and life will be easy