No, there hasn't been any specific reason.
At the last committee meeting, if you recall, there was a provision made for a motion, and that motion wasn't brought forward. Generally it is the practice that when there is a motion tabled, the members have the opportunity to bring that motion forward whenever they see fit and if they've given proper notice.
I allotted a certain amount of time for that motion. At the last meeting we had, that motion wasn't brought forward, and we were done questioning the witnesses we had. The same today: we have a witness who will be appearing before the committee today, and obviously it's open to committee members to question that witness as long as they see fit.