The game considers only some entries "active", but the web page shows all records (unless you change the period by pressing the "Today" or "Last Two Weeks" buttons), which usually explains the differences.

The web page sorts based on the column header buttons and goes back to the database to refresh the data when you change columns. Some categories are likely to be quite full, such as Stews, which will almost always have 100 people with "18" in it. You may not show up in those.

I don't know exactly what happens inside the application, so I can't help with that question.