I am not sure if this is a Bug...

...or if I just changed some kind of setting somewhere.

The posts inside of a thread have no logical order anymore. I ticked "sort by hot" on the front page, but it sorts everything inside a thread chronologically. It's also impossible to see who is responding to whom since the entire structure ( " boxes inside boxes ") is gone. So if someone replied today to a comment made 2 days ago, this reply is not displayed below the original statement, but at the very end of the thread. I couldn't find anything to undo this, but it used to be normal just a few weeks ago.. :( Please help me?

Edit: Problem solved.