According to my inferior knowledge, the commission would halt the interviews during CSS-2010 Exams and conduct the remaining interviews after the completion of the exams. It would not happen for the first time in CSS history. This routine has already been practiced in the past.

I think it is enough for your confusions that exams are going to delay due to interviews.

__________________
"Rishtoon ki khoobsurti aik dosry ki baat ko bardasht kerna hay.
Be-aib insaan talaash mat kero, warna akele reh jao gay."
Hazrat Ali (R.A)