What happened, a time warp or something?
Yeah, basically. Did you catch what all the characters were saying — basically stuff like "Be careful! Don’t fall into a time warp!" If you’re asking specifically why Squall wasn’t with all the other characters, perhaps it’s because his mind was still on Ultimeica and that’s how he got drawn back to the orphanage. At least, that’s how I interpreted it.
well at least this is how i understanded it.