Board Thread:Show-Related Questions and Answers/@comment-24304025-20141219181020/@comment-91424-20141219185823

Good question. Perhaps she didn't want people to get their memories back? On the other hand, she could have just killed Emma once the curse was broken in "A Curios Thing", but in the following episode ("Kansas"), she simply continued with her original plan: Make Emma lose her magic.

So I don't know. Your guess is as good as mine. Perhaps we will find out later?