Would be the key phrase is what I'm underlining here. Also, only 2 scheduled days left for the guest.
But the two they were supposed to be one where moved/cancled because of circumstances. Circumstances out of anyones control, but moved. So It would be understandable if the guest's schedule has now become harder to schedule around. That's all I'm saying. The three weeks they were supposed to be available at set times have passed, so perhaps they have things booked here and there for what would the times they'd appear on the show, thus complicating the scheduling.
Edit: Basically because the weeks that the guessed we're supposed to be on the show has passed, scheduling them might become a nightmare.