I am of the impression that as a rule geocentrism has never really been examined, much less taught as a Church doctrine in the SSPX seminary, not now or ever at least the U.S. Presumably, the question of whether God placed the Earth (where Jesus Christ came to dwell among men some 2,000 years ago and lives in the Eucharist today) at the center of the universe was not and is not all that important. On the other hand such things as Garabandal and Valtorta with her Poem of the Man-God have not only been studied, but actually promoted.
And now we have the SSPX leadership officially not only endorsing, but actually promoting Father Paul Robinson's book The Realist Guide to Religion and Science which among other things openly rejects geocentrism in favor of heliocentrism and which openly promotes the Big Bang.
I believe if the SSPX leadership had taken the question of geocentrism to include the question of whether the Church was right or Galileo was right a lot more seriously instead of a mostly head in the sand approach it would never have evolved to the point of openly embracing the scientific heresies encompassed in Fr. Robinson's book.