From what the directions say, she's doing it correctly. She picked up the left loop of that stitch and then knit into the back of it, which technically is what was the right loop of the stitch. It's no longer the right loop of the stitch, because it's now the back loop of the stitch she picked up.
"Trust the pattern!"
Time flies like an arrow, but fruit flies like a banana.
Hop aboard while we follow the cloud-covered van of knitting harmony, man!! Woooo!! --Hedgehog