Thank you for reaching out about this. It sounds like you may have a number of folks in what we call "limbo". This is when contacts are in your Emma audience, but they aren't associated with any groups, so you can't exactly see them without searching for them. The good news is that you can create a segment to find them, and it's really easy to do. Here are the steps:
1. Head to the Audience page, and click on the 'segments' tab (located right next to groups) 2. Click the button on the right of the screen which says 'create a new segment'. Save it as 'limbo contacts' 3. You're going to base this segment on 'Audience groups' and then click 'add' 4. Now, you're looking for people who are 'in' 'limbo' (select limbo from the dropdown provided of your groups) and then click 'add' 5. Click 'save' and Emma will do the rest. You will be provided with a list of contacts who don't belong to any groups.
Once you have the segment, you can copy them all into the group of your choosing, or create a new group for them. I hope this helps! Please let me know if you still have questions!