When you are invited to join a faction, you do not 'accept' the invite. You join the faction doing /f join (faction name)

To get people into your faction, do /f invite (name)

You can only be in one faction, so to leave a faction, do /f leave (name)

To get a faction title, do /f title (player) (title). These titles only show up in faction chat, and can only be given by faction moderators or the faction admin.

To change to alliance chat, do /f c. To go to faction chat from alliance chat, do /f c. To go to public chat from faction chat, do /f c. Only your allies can hear you inlly alliance chat, and only your faction members can hear you in faction chat.

It is called a FACTION not a stupid FRACTION