A collating system having a plurality of feeders to release enclosure materials onto a deck and a plurality of pusher finger pairs moving along the deck for collating the released materials. The pusher finger pairs are mounted on a pair of moving belts at pre-determined positions. A sensing device is used to monitor whether any pusher finger is missing, broken or out of alignment, thereby rendering a pusher finger pair non-functioning. If a pusher finger pair is not functioning, the cell or pocket associated with that pusher finger pair will be marked “damaged” so that the feeders release enclosure materials only to the cells associated with functional pusher finger pairs.