Hey Dave,
Have you checked your snap settings in Editor Preferences? appearance and defaults are different in UE4 than they were in Beta. I believe default in Beta was grid snapping to 16 (power of 2 snap settings), while in UE4 it’s a decimal grid system. You can adjust snapping to power of 2 in UE4 in Editor Preferences under Level Editor > Viewports > Grid Snapping.