Board Thread:Wiki-Related Discussion/@comment-32390199-20160308014810/@comment-25926288-20160308015750

It is done that way because they are credited that way. (I'm assuming that they were all credited as Blind Witch.) The episode title differentiates between the two. Although one is appearing more than the other, it was that other that appeared first. So, Emma Caufield's witch appeared after the first Blind Witch.