Well, there have been sɛҳuąƖ scandals in the SSPX too in my country. Recently an association specifically dedicated to denouncing sɛҳuąƖ abuses among the religious communities has published a report mentioning sɛҳuąƖs abuses by some SSPX priests.
In those cases, the SSPX had not a better behaviour than in your country. Actually, she does the same thing as the Novus Ordites: the sɛҳuąƖ abusers are transfered, but not charged with their crimes...
The SSPX wants to convey the image that we are the bests, that everybody is perfect among us, and thus, there are no pedophiles among the priests or the brethren!
However, I had never heard before that eight boys had willingly commited sodomy in a school... They might have been corrupted by a pervert, and then they inflicted the same abuses on other boys. Such thing happens among the sodomites: some of them have been corrupted in their youth.
Once again, the SSPX is to blame not for the crimes themselves, but for her carelessness when faced with the evil.