Logic 10.3.1/10.3.3 BAD Nudge BUG

Only 10.3.1 /3 possibly 10.3.0. Cannot reliably use nudge commands.To replicate :select one audio or midi region , say  4 bars in length ,assign key command to following nudge values e.g.

Nudge right/left by SMPTE BIT                  (shift option- plus/minus)

Nudge right/left by SMPTE 1/2  FRAME    (shift control plus/minus

Nudge right/left by SMPTE  5    FRAMES  (option-plus/minus

I nudge right by 10 bits by pressing key 10 times , region moves 10 bits to the right. 01 1 1 10.

pressing minus button , nudging left 10 times region only moves it 5 bits to the left  01 1 1 05.

same with other values:

If I nudge right by 10 1/2 frames by pressing key 10 times , region moves 10 1/2 frames to the right. 01 1 2 74.

pressing the minus button 10 times, nudging left by10 1/2 frames Logic only moves it left to 01 1 1 05.

Further more if I nudge by 1 1/2 frame to the right and then nudge 1 to the left I get a minus value! 0 4 4 240

Assigning option command -/+ ( or any other key combination )to nudge left/right by one beat doesn’t graphically move the region ( though it shows up in the undo menu ) so unusable .

Have tried all this with//without grid/snap selected.

The operation of audio region cutting/moving crossfading seems flawed in logic pro X to me.Apple seem to have traded looks , bloated patches and sluggish  GUI  for clear , fast , accurate and reliable audio /midi editing.One would think that after 3 years or more X would be reliable.Please can someone check this out and confirm.Thanks.T