The tracker is based on both accessable and completed content; For example: as of 1.23c there have been more than 40 grand company leves, but only 40 accessable by any individual due to the exclusivity of some GC quests.

if you lookup someone's profile and use the compare tracker function, you can see the differences, especially if they are in a different grand company or began in a different city.

If you have some specifics for me to compare and assist with, please let me know.