How am I meant to level with a friend now?

[Warp]

lol FFXIAH only marks people as active if they have made a transaction in the past 30 days and it only records transactions if you have signed up on the site because it has to link the site information with your character information via buying a crystal from the AH server, which the site records. What does this mean? This means that it doesn't record those that are not registered with the site. Also, there is no way to view EVERY active member in the game by using FFXIAH because it will only display 100 results at a time. The only way would be to continuously click next until it wouldn't go any further...that's a lot of clicks.

You have no idea how FFXIAH collects it's data. You don't have to sign up at all. It reads the auction house records for EVERYTHING and keeps track of it.