So I guess it depends when these events took place.
I think that Zelena revealing the slippers to Rumple happened not long at all before the scene we got with Rumple, Jefferson and Regina.
Very soon after Zelena left with the slippers, Rumple put in the call to Jefferson, because he wasn’t yet fully convinced of Regina’s capabilities and also the slippers would get him to Bae much quicker than waiting out the Curse process. At the time Zelena got back to Oz, that’s also when Dorothy was there, and then Jefferson showed up and started nosing around for the slippers for Rumple, and when Zelena heard about that, she gave the slippers to Dorothy so she could take them out of Oz. Then Jefferson went back to FTL and we got the scene of him with Rumple and Regina. I’m thinking that all took place over the course of, like, a week or something, so Regina in this ep is at the same stage of her magical ability as she was in The Doctor.