I knit socks on two sets of circulars so I won’t be much help to you probably. What I do for the heel flap is drop one set of circulars which holds 30 stitches and just work the second set of circular that has the other 30 stitches and work back and forth for 2 1/2 inches with the heel flap pattern. Maybe it would help if you would type up more of the pattern for us.