[dasher]

That one might be because there are many Saints named Teresa, and someone doing casual or sloppy research could have made a mistake.

https://en.wikipedia.org/wiki/List_of_sa...med_Teresa

Though I will say that I also thought she was already a Saint.

E: This Saint Teresa was Canonized in 1993 and people hearing about it could have mistaken it for Mother Teresa, or time passed and people recalled old news incorrectly.