If a shopper does not complete an Insta-Shop set in the run, the shop is marked as Abandoned.  At this point, the shop report can not be edited by the shopper or reviewed.  Because the shop was not completed, it is added back into the count of unclaimed shops for the batch.  For example, if the batch had ten shops total and all were claimed, and one shop is abandoned, the batch would now have one unclaimed shop available to shoppers.