picture not showing so can’t help
Link from OP.
It all looks pretty good. There’s a couple of problem areas I can see though. Are you using any custom CSS or themes?
When disabling that theme does the layout change? To me there looks like something else changing the layout, if you haven’t played around with it in anyway.
Try disabling any plugins too, if you have any.
Failing that, is this your first time installing bbpress? How did you go about installing/setting it up?