Bcoz of the ongoing blackout of channels Disney-Star did not schedule much of the popular movies they usually schedule for weekends. Remember issue got sorted just yesterday and still not sorted completely and schedule is decided few days earlier hence as advertisers would have requested for decrease in ad slot rates bcoz of reduction in reach of channel hence it was safe option to air movies accordingly and keep more popular movies reserved for later days.
Now that issue has been mostly resolved they seem to have reverted back to original schedule tomorrow onwards , maybe even made last minute changes to it. Now they can negotiate and raise the ad slot rates back to levels which existed before the dispute. Movies like Bhool Bhulaiya command good pricing for ad slot rates and there was no point airing it during blackout