Matt - I have seen this discrepancy, too as I was looking at Indian unity to be specific. I was looking at the scenarios and noticed that there were 3 players that completed the book (You, Daniel and Mike P), and when looking at the Games page under Indian Unity, I open the Scenario list, I see the following:
showing only 2 plays on some of the scenarios.
However, going into the scenario list on the Scenarios page, I see this:
(probably the correct one) showing at least 3 plays on every scenario.
I am not certain if there is a disconnect in the data collection for the different pages or not.