instead of matching my framerate (when in the framerate range 48-144) to my refresh rate, my monitor keeps doubling my fps and then refreshing at that rate, say i have 55fps, it will say 110hz on the monitor settings screen, but when i get 60fps, it will display 60hz, and if its 120fps, it will say 120hz. what is this doubling for, before it never used to happen?