If you have more than one toon in the kin, please make a note on the kinship page of the social panel. If you look at that page, you'll see "class, level, member" then "rank & online" and then "location." If you click location you will change it to "player note" and see who everyone's main or alt is, assuming they have entered a note about their toons. You can add a note by clicking the note tab at the bottom of the social panel, typing in the note, and then click "update." It may also be helpful to add what craft you do too.
If you are an OO and have recruited someone's alt, please make sure to remind them to do this. Also, please remind them to add the alt to the kin site, under their account. Thank you!