monitors not going to sleep

ok so its not a huge deal but figured id drop a line about it- perhaps it can be fixed in an update ------ when i run eyefinity mode  with 3 monitors  the middle one only sleeps not the other 2 ----- but i can run them as individual screens   and have no problem with them sleeping ---- im running an i5-4670k, 2x r9-280x, win-10- any more info needed don't hesitate to ask