Hello!
I just checked, and there looks to be an error in that rnd! The parts you skip is where the error is at. Instead of skipping 2 sc, ch-3 sp and 2 sc, you should only skip 1 sc, ch-3 sp, and 1 sc. Thus, this line should read:
Incorrect: (red)
Rnd 3: Ch 1, sc in same sc, ch 5, sk next (2 sc, ch-3 sp, 2 sc), *sc in next sc, ch 5, sk next (2 sc, ch-3 sp, 2 sc). Rep from * [7, 7, 7, 8, 8, 8, 9, 9] more times, sc in next sc, ch 2, sk next (2 sc, ch-3 sp, 2 sc), join with a dc to first sc. ||10, 10 , 10, 11, 11, 11, 12, 12 ch-5 sp || AND || 10, 10, 10, 11, 11, 11, 12, 12 sc ||
Corrected (blue)
Rnd 3: Ch 1, sc in same sc, ch 5, sk next (sc, ch-3 sp, sc), *sc in next sc, ch 5, sk next (sc, ch-3 sp, sc). Rep from * [7, 7, 7, 8, 8, 8, 9, 9] more times, sc in next sc, ch 2, sk next (2 sc, ch-3 sp, 2 sc), join with a dc to first sc. ||10, 10 , 10, 11, 11, 11, 12, 12 ch-5 sp || AND || 10, 10, 10, 11, 11, 11, 12, 12 sc ||
Let me know if this helps and solves the problem?