Everything should be fine, just give it some more time. I've had some take as long as 2.5 weeks.

The white stuff I've seen on mine too, I'm not sure what it is but I typically have great results with a very similar cloner so I wouldn't worry too much about it.

I was curious myself about cutting the leaves in half, and did a side by side comparison and saw little to no differences in clones (same tubs, same room, same genetics, same feeding schedule). I do however like to trim the leaves as it lets me put more clones per tub and they don't wilt at all when I trim the leaves whereas the leaves that don't get trimmed looked more droopy until the next day after cutting.

The only dramatic difference I can see between our cloners is that I run mine 24/7, and I use clonex gel + clonex cloning solution with RO.

Edit: Typically the white stuff comes a few days before I started to see root bumps develop. I'd guess within 3-4 days time you should have root bumps if not dangling roots.