First, your student shouldn't be able to see what the other students are doing. Second, it is more likely that he or the other kids (or both) are confused as to what is going on.
I'm familiar with MCAP at MS level - not sure how it differs at ES, but it is administered electronically in multiple sections over shorter time periods. It is possible that the section order is just being randomized among the students, so that they are not all working on the same section at the same time.