Just when I think I'm making progress on this sock, fate hits me upside the head. I'm working on Denise's toe-up socks for the Socknitters SAM group, finished one and almost done increasing before the heel on the 2nd. Check my notes - crap, according to this I've increased too much. Something doesn't sound right but I can't quite place it. I remember taking notes as I went the first time, so I tell myself to trust the notes. Very carefully I weave needles through what should be the last pre-heel row, frog back the dozen or so extra rows, and turn in the pattern to the round heel directions.
And find a second set of notes about where to start increasing, and how wide to go before the heel. Crap! On the first sock (I now remember) I'd needed to frog back and start increasing sooner than I had originally, and had added more sts as well, which matches the second set of notes. I'd written it down right the second time, but had forgotten to mark out the first set of (incorrect) notes.
So I'll have to unwind another dozen rounds or so, and start increasing all over again, but at least I know I'll be on the right track this time. I hope.