I love the leaverbuster. About a month ago I got a message that I won't be receiving loot anymore because I've been leaving too many games. I went a long time without updating nvidia (I'm just an ignorant old man when it comes to computers) so my shit was freezing constantly. I updated things. Played consistently for about a month, last night it froze again. I thought oh god, I'm fucked now. Immediately restarted my computer, hopped back into game, and finished. No message about anything.
I think because I played so much the past month (probably around 50-75 games) without any leaves, I went back down a tier as far as getting punished for it. I'm glad it has that kind of forgiveness. I've never intentionally left a game, but still my computer freezing was ruining games for people. I updated again, so I should be good (automatic updates are on now, I know, I'm a dummy) and I'm glad leaverbuster was fair and lenient on me.
Your situation sounds crazy. Maybe you have to play more games. It's not just time passrd, it's games played as well. Or else griefers could have 5 accounts and just rotate through them and come back after time has passed, ruining games indefinitely.
Edit: oh shit, I forgot about the part where it kicks you out. That sounds buggy. Definitely file a support ticket.