I've got people on multiple lists, and I want to make sure that I don't send multiple messages to them. I know there's a "filter duplicates" function if I'm sending one great big batch to multiple lists, but if I want to send different messages to different lists, how can I avoid duplicates?
Aside from the suggestion to have "Send to list 1, except where user exists on list 2" kind of functionality, I tried finding the duplicates, but that didn't work either.
If I use the selection function to choose all users on list 1 OR all users on list 2, then I get 430, and with the duplicate checking, I might get 415. However, it doesn't work if I try to select users on list 1 AND on list 2, which returns 0 results.
How do I find these duplicates?