The shenanigans with all this weaselling around with what the Third Secret refers to is troubling.Yes.
Has any credible Catholic authority compiled all of the various statements about the meaning of the Third Secret?Yes, it was published by the Vatican with commentary. If you mean all the statements by various groups claiming this and that about the meaning, I don't think that is possible. So many people are trying to hijack this thing that its impossible to be an expert on all of them.
Why did or why would factions in the Vatican try to dismiss and poopoo the Third Secret?Not sure what you mean, but I didnt think they did poopoo it. That the various divisions of the apparition fringe isnt satisfied with what it said since it didn't say what they wanted it to say. Similarly so many demand that the Pope say what they want him to say or the Bible say what they want it to say, but that doesn't mean it was poopooed. (can I say poopooed on FR?)
Wasn't it supposed to have been made public in 1960 when part of it allegedly would already be in the process of coming true according to Sr. Lucia?No, a creation of various types who think the Church wandered at about the same time. It fits their world view.
What was it that was coming true in the early 1960s? The great falling away, the great apostasy? You know, you sort of wonder why John XXIII didn't want to make it public.It also makes you wonder about the folks who make the claims about it. If God was really trying to say something more about it, and if God had said through Mary that it was to be published in 1960, do you really think Sr. Lucia would have obeyed any earthly instruction to remain quiet about it?