These threads which have the purpose of criticizing others should not be allowed to be anonymous. Have the courage to use your own name if you are going to do it.

Is fr. Francis Miller's lineage of sebastain or duarte-costa?

No, Thuc through Vezelis. 

Can someone explain how excommunication prevents valid sacraments? Validity = matter + form, yes?

It's been brought up, a Cyprian understanding, as if it's held that those outside the Church cannot confer valid sacraments. . .

Do not conflate what is illicit with what is invalid.

I've never bothered to read texts on sacramental theology, but I'm guessing I get the gist of what's being argued.

Yes, you’ve essentially got it. 
To really simplify it, in the Cyprianic view, one is ordained for the Church, and if one leaves the Church, the Holy Orders “disappear”, at it were.  There is no indelible mark.  This is what is believed by Eastern Orthodoxy, although not all Orthodox follow this as strictly as others.  The Greeks are the most ardent followers of this view.  They extend this even to baptism.. If a baptized person apostisizes, he must be baptized again upon returning to Orthodoxy. 
The Russians are much more “liberal” in their interpretation.  So much so that some Novus Ordo priests are received into Russian Orthodoxy without being ordained, but only “vested.”  The Russians apparently do not have a problem with Novus Ordo ordinations..
The Augustinian view, accepted by the Catholic Church, is that ordination leaves an indelible mark on the soul, and if one leaves the Church, he still retains this sacramental character. 

A friend at church last week told me about CathInfo and how there is so much information on it, and now I know that it's all TRUE!

Right from the home page I clicked on this recent post about seeking information and BOOM! right there on the first page there is a link to a page with all kinds of information about this bishop. His date of birth, his education, his churches, a description of his apostolic mission, with a dozen links to Catholic encyclicals, which all look great - at least at first glance - but I need to actually read them to see for myself. Even pictures! And another link with the bishop's own words and his direct email.

And as if that weren't enough, there are even more posts with history and scripture and eyewitness accounts by people who have actually met the person.

Wikipedia has nothing over CathInfo. They don't give direct email where you can contact the person directly yourself. I mean, if the person's alive, who better to tell you than himself, right? And there's even an address and a map and directions!

Thanks CathInfo members. My friend is absolutely right, it's the BEST! I'm gonna click some more posts and discover even more!

Even had the excommunication been legitimate, the bishops he consecrated would still be valid.

Right. That is Sacramental Theology 101. 
Also Msgr. Perez is not a bishop but was somehow given this honorary title by some bishop in India. That makes no sense because only the Pope can give such titles. You can't just make things up because there is a crisis. Similarly, and I don't mean this out of disrespect to the dead, but I never understood how Fr. Leonard Giardina was called an "Abbot" when he was never installed by the Pope. I digress though...