List merge questions


Hope everyone's having a nice Tuesday afternoon!

Quick couple of question regarding the contact list merge:
1. When new email is added to the individual list that is part of a merged list, will a new contact also get added to the MERGED list?
2. How is MERGED list designed to be used on this system? Is it for one time use?
3. When deleting the MERGED contact list will all the associated campaigns be deleted with it?
You mean the sync lists function under Lists --> Tools? That might just do it.
One of my clients is hesitant to delete those merged lists because they want to keep campaigns so they can show them on website via RSS and it is a slight annoyance fi they will be creating a new merged list every time they send it. thanks