I love MOTU for their audio interfaces. That’s where they are good at.
The first test experience i had with a MOTU videoproduct and FCP was terrible
The unit mixed up PAL and NTSC framerates. Now that’s a bad start.
Save yourself trouble and get a AJA, Blackmagic or Matrox solution.
A. all your clips are shot anamorphic and have the anamorphic flag in item properties.
B. your sequence settings are SD Anamorphic.
C. Copy your timeline. Select ALL , then remove attributes. Scaling and distortion.