It isn't a tear hence why he's been on and off the track for two months. Things aren't always black and white. Also perhaps North do have a magic formula that Collingwood aren't aware of and I'd have thought asking Levi himself would make more sense...
You'll note
Apex36 that I asked how often he's been on the track and involved in full sessions. A noted track watcher confirmed he'd seen him involved in one full training session that he's attended this pre-season. Whether he trained today or not was irrelevant to what I asked and when I asked it!
Edit: As shocking as it may sound I'm as glad as anyone to see that he's been able to step up his loading.