When I write new posts, posts I've already read becomes marked as unread.
If the posts are in the same topic?
Also, why is it that sometimes when i edit my post i see "this post has been edited x amount of times", most of the time i don't see that though
This will show when a post is edited after someone has replied to the topic after you have.
If no one has replied after you, you can edit to your hearts content and that line will never show...
Hope this helps,
Des. . .