IOW... they can't really say "we overturn the amendment", but they think they can say "you didn't actually amend it". A federal court could (at least in theory) say "that conflicts with the federal constitution and cannot be enforced" (just as if a state constitution banned abortion... it would still be in the constitution, but would be held invalid).
That's worked before, but looks set to fail here. One of the supporters of gay "marriage" on the court wasn't even willing to review the challenge... she only wanted to decide whether existing "marriages" were invalid given the amendment.
Really. Thank you for clearing that up for me. I am not as sure as you are, that they won’t say that the process was flawed. They will most certainly throw it out. They already ruled that same sex marriage HAD to be allowed.
Soon, these homosexual groups will have things turned around so much that they will demand that everyone have at least one homosexual experience!