this is really, really unfortunate, but i'm afraid it's not something that we're going to be able to fix.
ideally, posts in a topic would be ordered by their postid. the problem with that, is when everything from the old forums was imported into the new forums, it was done very haphazardly and not in any real order. because of that, we order posts by the time they were created, because ordering topics by postid means those old topics (including a lot of threads that are still active/in use) get their posts displayed completely out of order.
normally, this works just fine, and no one will ever notice any weirdness. but in event threads like these, they move so quickly that there are multiple posts that have the same timestamp. and our database engine is a little bit weird that it doesn't automatically order tables in any way (afaik most of them order tables automatically by their primary keys), so the results get spit out in a semi-random order. so while they are ordered by their timestamp, posts with the same timestamp are not always going to be returned from a database query in the same order. they'll get mixed up.
i really wish that there were something i could do about this. but given all of the different factors that contribute to it, there's just not. :(