Hi Aqua,
We were able to see and duplicate the problem you were seeing and I think we have now fixed the issue. The problem was pretty simple once we figured it out. It seems when we uploaded the new files the encoder software for some unknown reason inserted a blank space at the beginning of some, but not all chapters. We renamed the files with this issue and they all seem to be working now. You should only have to refresh the WB browser page for this to work now, If it doesn't try clearing the cache.
We're still working on the new OnDemand files, but hope to finish over the weekend or early next week. However, most things should be working now except for rotations.