Same I got to round 41 on kino and didn't count.
I was pretty pissed. Treyarch barely put any effort into matchmaking for zombies.
1. When you search, the host can't talk or hear any other players in ur lobby.
2. Migrating hosts in the lobby makes you get disconnected.
3. When the host leaves the game, the game ends, no migration.
4. You should be able to pick what character you want to be.