Huh. See, I read that as you're just doing one set of short rows. "Rib pattern as established" would be as it was established before you hit the short rows. I would have written it to say "repeat the last two rows xx times" if I wanted you to do another set(s) of short rows.
Is there a row later where it says "ok, stop doing short rows and just do rib?"
Pattern link so we can see what you're working on? That would also make a difference because something very curved would call for more short rows than just one, but something like just adding a tiny bit of height to a collar or more depth in the shoulder back area might need just one.