I have had quite a few guys over for a one on one session around the hones.
One thing I have noticed in addition to too much pressure is this:
A few of them honed all the way down the hone.
By doing so while adding pressure to the razor when sliding off the short end of the hone, it is pretty much unavoidable to get scratches behind the bevel.

I'm not sure if this is the case here, but I thought I should mention it as a possibility.