Firstly, Player pages are broken into two major views.

View 1- A gamer tag.  This will show all of the stats of a gamer tag, and if the gamer tag is linked to an account at HaloTracker, your posts, and profile.

View 2 -A user id. Your halotracker user id. If you see this view it will load your secondary gamer tags and show all of your tags in one place.

The second major part of the stats is the Reach Types. On your player page, you will see Standard, Arena, Invasion, and Total.  If you click one of these you will the stats for that view. Only Standard, Arena, and Invasion currently are ranked on the site. The Totals are not (yet) and they are just for you to see.