Errata (changed on version 04.23.12 of the pattern pdf):

There is a second update to Chart C. If you are having trouble on row 4 of Chart C, please email errata@twistcollective.com and ask for the second revision to Chart C. Sorry for the inconvenience!

Row 3 of chart C should be worked as follows. It should read

3 no stitches, ssk, 4 yo’s, k tbl, 6 no stitches, k tbl, 4 yo’s, k2tog, etc (rest of chart is fine). HOWEVER, that very first ssk and the very last k2tog (at the start and end of the edging) only should be k tbl.

after that it should be smooth sailing.

I also noticed that the symbol for decrease 5 stitches to 1 should read k3tog, k2tog, pass 2nd stitch over (not p3tog, p2tog, pass 2nd stitch over). It’s not a huge deal if you do it purlwise, but it will look nicer if it’s done with knits.