Hey all, my apologies for the late reply- I was MIA there for a bit!
I think you're workflow is basically the same as mine (only major difference is the Maxx), so thats great to know!
The first time I noticed this discrepancy was when I put it on rec run for a particular job. Normally I work in free run with multi cams and so far I haven't had any comments/complaints from post. All the settings seem to be set properly on all the devices, no offset on the ERX's. I'll do as @joinwooHK suggested and record a beep in all timecode modes.
Thanks mate, i'l