Child sock fail

I used Eileen Montgomery's pattern to knit these socks in a child size small,  at the request of a neighbor.  The socks are too large, but the opening at the top is too tight.  I used tension 6 for the main tension, and the instructions said to go up 6 tensions for the loop-through-the-loop bind off.  Unfortunately, I could only go up 4 numbers since the highest tension is 10.  And, they are too tight.

I will also deduct 5 rows of knitting from the body of the foot for the length, (it specified 36).

Since these socks are made from the back of the heel, down the bottom of the sock, then the toe is knitted, then the top of the sock, and finally the ribbing, there is not an easy way to remove 5 rows.  That would be easy if the socks were knitted from the toe up or top down.   The seams were sewn with the yarn end at the end of the ribbing, so the seams will need to be un-sewn first, then the loop-through-the loop cast off undone, the ribbing unknitted, the toe unknitted, then remove 5 rows of the bottom, re-knit the toe, re-knit the instep, and finally re-knit the ribbing.

These socks were made from leftovers from other projects.  Maybe I will just keep these as a learning experience and start from scratch with new yarn.