Eyefinity problems

My monitors are 1920x1080 at 60hz recommended ,with max reported at 1920 x 1200 at 70, eyefinty fails input not supported . If i switch one monitor for my 24 that says max 1920x 1080 eyefinity works, is it monitor firmware that is wrong need to remove max settings and make max 1920x1080 @60 any thoughts , the 1920x1200 Only showed up after installing the drivers for my r9 390