The stitch marking should be in Rnd 2 instead of Rnd 3. Thus, they should be as follows:
Rnd 2: Beg-V-st (see Stitches), V-st (see Stitches) in each ch-2 sp around, join with sl st to 3rd ch of beg ch-5, mark ch-2 sp of last V-st for attachment of next Layer.
Rnd 3: Beg-V-st, V-st in each ch-2 sp around, join with sl st to 3rd ch of beg ch-5.