Status Order page messed up

Status Order page messed up. The status page (and only this one because the shopping card and the product pages look perfect) duplicates the information. The info regarding the order appears at the top of the page (between the wordpress bar and my header), and it shows up again where it shoul be.

This happens in my theme (it behaves fine in the original one). My question is, where should I take a look at. Taking in consideration that in the two other pages it works fine. What is so spetial about the status page?

Thanks in advance.