Here is what I accomplished.
The sock was started in the middle with a provisional cast-on, you may recall. That way I could knit the foot, then pick up live stitches to knit the leg as long as my yarn would allow.
What I didn't note, was the dropped stitch. Several rows later, I realized I didn't have the correct number of stitches. Hmmm. Where was that extra stitch? Dropped down -way down - into those 'Slip one, Knit one' heel flap stitches I like so much. Ouch! That made it very difficult to correct and try as I might, in the end, I had to rip it.
The second attempt, I knit for an inch before starting the heel flap. A much better plan and now - I am about back to where I started.
It is a good thing these socks are a quick knit. And it's a good thing knitters are not easily discouraged. But the socks will be accompanied by this note - to paraphrase the yarnharlot : "All 50,000 stitches in these socks were knit with