Right now I don't support multiple groups. That was on the roadmap, but I haven't put it in yet.
I figured most people didn't need multiple groups immediately, but if I hear it's important, I'll definitely prioritize it!
Thanks for trying it out with a more "realistic" data set. I have some friends' lists, but would love for others to try it with their own data.
Let me know what you think! Is this a show stopper?