Thanks, Marigold. I knew it makes a tighter rib because of the twisted sts. On the mitten video tutorial I used, that's how she does the ribbing and doesn't use smaller needles to keep the ribbing from being too loose. I think the instructions in the OP's pattern aren't terribly clear.
Cheating is an option. . . . Cheaters never win and winners never cheat, but smart knitters who want to retain an iota of sanity do, cheerfully. ~~Kory Stamper