Yeah, that is normal in terms of one side being more receded than the other, That is what happened to me, my right temple was the best side at 17 (barely receded) and left side was worse now at 19 the right side has receded more than the left side. So unfortunately it will catch up and possibly end up worse.
Now I wish that I had the "barely receded" side back.
I also would love to shave my head again too but because of the recession my whole face looks odd now compared to when my hairline wasn't receded and I HATE it, That is what annoys me most about a receded hairline.
If only I could have the NW0 hairline back again, I would feel and look normal with a buzzed head.