That's what I figured geod. Don't beat yourself up too much about it though. DD2 is the only game I've worked on so far that is this insane about it. Even DD1 isn't really that bad although both games really need to be gone through "frame by frame" a few times to fix other weird issues.
Maybe one day you can fix it? Maybe not.
Tons of other stuff that needs doing now that's a lot easier to do though, right? :)