The Mystery Of The Sheets.

"Hmm. This has to be intentional. But why?" He said in wonder and confusion.

The more he inspected the 6 sheets of paper, the more he is certain that their weirdness is intentional. Each of the particularly odd elements are also in the same quantity as the others in each paper. 

It might be a coincidence that two different elements which are highest in two papers are of the same quantity but it is unlikely that it is a coincidence in 6 sheets of paper. He has a rather convincing reason to believe that it is not random but why would someone do it?