Shoutbox

They might not always be genuine people, they could just be bots that he's ignoring.

Also I've had it on occasion (not so much recently) that I log in and everyone I've ever deleted pops back up, seemingly trying to add me again (when in fact it isn't)

The easier way around it all would be to ask your boyfriend.  If you think he's lying when he answers then you obviously don't trust him and shouldn't be together....if there's a reasonable explanation that you believe, then it's problem solved.