As far as I know, both bounty threads are active, but duplicate entries are not allowed. As for Tombola Telegram group, I don't see any problem joining it.
Since there are two active bounty threads, does this mean that the other bounty accept participants too? How about the distribution of tokens or the bounty pool? Will this affect the percentage of the bounty pool or not? Do they have a separate distribution since two bounty threads are managed by different person?