I have a problem with this little paper and arrow in side of nickname when someone wrote a post.When i see a new post i click at this one and this take me to other topic.And i dont know whats going on.

it seems to work fine here
Its possible that another post has been made after you last refreshed the page,
so when you click it, it takes you to another post

No no,it takes me to other Topic,not post.Like i wanna click to get to in Advanced Topic,and this takes me to Topic from General Chat...

oh
very strange, it doesn't happen here
try a different browser - see if the same thing happens