I feel like I am having the same issue on ever razor I try to put a edge on. (except for ones that have a truly straight edge) Thy feel like thy shave OK and in some cases very well.
But the bevel never looks even. I know that it is something I am doing but I don't know what? If I see the issue early and start chasing it and it only gets worse.
It almost seams like it happens in the same spots on the same side of the blade.

On Razor A you see the bevel starts to get bigger towards the toe and I get these scrap marks towards the heel on the spine. the scratch marks in the circle above the bevel were not there when I started to set the bevel.

On this one I use gssixgun's tape method that he explained to me in my last honing post with 2 layers of tape on top of it.
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Razor B ended up with the same grind marks on the spine on the same side but the bevel started to form a frown more towards the heel.
This one had one layer of tape.
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I am having lots of trouble getting to the heal on both.

Thanks in advance for any help.
John