yes and no.
you would have been friended to the group leader, but that friendship would have been removed within 20 seconds of you joining the group.
the other oQueue added people are mesh connections. it's partially random in that people connect to one another when someone hits 'find mesh'. they usually do this to increase their connectivity and improve the data flow. we generally recommend hitting 'find mesh' when your connection (located in the lower right) sums to less then 20. when you do hit 'find mesh', you're requesting 6 randomly selected btags from the scorekeeper that have been active in the last hour. when received, you will try to auto-friend to them. if they are still online, you'll get a connection and they will start to send premade data to you as they receive it. if they're not online, then they will auto-friend the next time they log in.
you can remove yourself from the mesh by clicking the 'remove b-tag' button on the setup tab as well as unchecking 'auto accept b-tag mesh requests'. if you do this, it does limit the potential conenctions of those stranded on dead realms.
also keep in mind, you can remove oQueue added friends by clicking the 'all', 'offline', or '5' buttons on the setup tab.
if you want to see the btags of those added by oQueue and ready for removal, type:
/oq show remove
if you want to keep someone from being removed, right-click them on your friends list and set a note.