I believe it is appropriate to point out that Fr. Pfeiffer, in his most recent sermon, defended the priesthood of Ambrose Moran.
Now if Fr. Pfeiffer thinks Moran is a priest, and he has gone back to fully defending him (he sees no problem with his schismatic and shady background), why wouldn't he make use of this available "priest" to say "Mass" at the various SSPX-MC missions?
I would be surprised if Fr Pfeiffer did otherwise.
The problem is the confusion in Father's head. He overlooks 35 pages of analysis by Fr. Ortiz (which delineates the problems with Ambrose Moran in the most sober and orderly of manners.)