Hi,
Thank you for posting in Symantec community.
* Using the SEPM Client Deployment Wizard, some PC clients move and others do not. Some that do move to the new server, actually move back to the old server after about 15 minutes or so.
--> Need to verify Sylink.xml file for those clients.
* Some PC clients stay connected, but do not display a Policy Serial Number in the SEPM. When I remote control the client, it shows the correct Policy Serial Number.
--> Could you run the management server confugration wizard again.
* When I sort the client listing by Name, Health State or Logon User or Computer, I get one listing of computer names. If I sort the same group by any other column, I get a different listing of computer names. It has only been a couple of different clients that I've noticed, but it's enough to cause concern. The number of computers doesn't change on the details page.
--> Make sure SQL database maintenance is happening regulary. Especially make sure after new install of SEPM database maintenance has taken place.