Your news post wasn't deleted. Steve just reposted without checking to see if anyone else posted this yet I think. What made you think it was deleted?
As for the other ones, I know I removed someone's post about Great Adventure news at one point after it wouldn't merge with the one I posted for the front page. But that's not something we try to do
If it's Six Flags news that we want on the main page we either have to move an existing thread to that forum or one of the mods has to type a post in it. And hopefully we can merge any existing threads into it. But we try to avoid the situation if at all possible in the first place