lemdro.id is a specialized instance, not a general one. !android was also created and popularized by the lemdro.id team, but when they decided to move to a dedicated instance, LW admins just installed their own moderators to that community. Also, there are more: !android, !android
Basically any community on LW will have an equivalent community somewhere else. Because even if people don't plan long term to stay on LW, they will use it as a cheat code to grow and then move somewhere else. And then LW admins just takes over the old communities.
I'm not sure how either side would agree to "merge", since wanting self-governance was the reason the split happened in the first place.