I've seen this kind of behavior myself recently too. There's also been some discussion among the Access MVPs about continuous form display/rendering issues, so you're definitely not the only one seeing weird behavior like this. Microsoft is aware that there have been some issues in this area. I wouldn't spend too much time tearing your database apart trying to find something you did wrong. Hopefully we'll see it cleaned up in an update soon. I'll post more about it as soon as I hear more information, but you're not alone. I'm seeing this in my databases too.