I would agree that theoretically you might be creating a secondary bevel when you raise the spine. The other explanation is that while honing you have somehow either raised the spine or rounded the edge. The one thing I have noticed when I give a video honing session is that people hone to fast. This will almost always lead to a lifting of the spine and result in a slightly rounded edge.
I would suggest going back to the hones for a short while and flatten out that bevel.

My two cents,