Wow, I wonder how it even works...
(with skip offsets so far away from the truth, I would expect either raw backend errors, or at least wrong black level)
Remember DeafEyeJedi's test with white level? You may have to do something similar for raw offsets: run raw_diag's OB zones test for each crop_rec camera (100D, 700D, EOSM, 5D3 for double-checking) in all supported video modes (Canon modes x crop_rec modes). Ideally also with crop_rec turned off, just in case.
Or imagine some automated test (maybe a Lua script) to do this job for you (ideally also validating the borders).
The screenshots should be in the directory mentioned at the bottom (on your card, of course). Tip: convert them to png if you plan to upload them.