We're slowly going through our business contacts and attaching a Category to each one. To make it easier, we sorted by category, so that all un- categorized contacts came to the top. We then created a new NO CAT List folder, and dragged these not-categorized contacts into that List. We then started adding a category to each.

Last night, after we'd finished, we deleted the NO CAT List, since we didn't need it any more. Strangely, when we went to check the names in the all Contacts list, most if not all of the contacts from this NO CAT list had their category removed. We ended up having to do them again.

Is this normal behavior, or did I just see a temporary glitch. I may not understand how Lists work.