I don`t see how using specific AC events to compare with FF7 is wrong. FF7 and AC are in the same compilation after all (story wise, characters, etc.) They are all connected, so it`s reasonable to compare specific events between the two products. I was talking in a 'order' sense that Cloud saw the incident first in FF7 and then he saw it again in AC.

As far as 'compilation' process goes, of course, Square is going to borrow something from the previous installment and spice them up for the next one. It`s a possbility that they take the glitch out and made it look more legitimate in AC, but that`s hard to determine because they usually have done like that but with "unglitched" parts.

Some of these glitches you listed are interesting, but like I said, most of them don`t bring relevance to the story.