Premiere distorts 2.0 anamorphic R3D footage when paused in the source viewer
Just finished working with exact same sort of footage. I never got that issue.


Update Premiere CC.
Start a new project from scratch. Import one R3D file and create a sequence from it. See what happens.
Create a new project in another editing program, one that can read R3D footage. Create brand new sequence, see what happens.
Try this solution: https://video.stackexchange.com/a/16246/11961