The only rational explanation of the announcement is surely that they have identified that the number of staff required to handle aircraft larger than F70 size doesn't warrant the cost. Hence the Flybe Jersey also being retained. Because if it was just timing, they could have adopted a policy that says "charters only accepted if they can be timed to operate either shortly before or shortly after a schedule".
And they are presumably re-modelling the terminal so that it never handles more than an F70 and a J41 load at any one time - 105?
NS