I’ve run into this as well. There are, if I’m not mistaken, two versions of the Prelude in C. It’s the longer version, with that extra measure that Schubert used for the Ave Maria. It’s probably not an error in Yolanda’s, she just chose to use the “other version”.
If I’m not mistaken, the one that Schubert used was from “Book One”. There’s one version in the Well Tempered Clavier and another with a collection of preludes and fuges. They aren’t identical.
So it’s not enough to have a copy of the Prelude if it’s been used in another piece, you need to know which one. One is BWV 846, the other is BWV 846a (alternate version).