Public Folder move is not matching with new server?

I notice I had a few Public folder not matching after moving to a new Exchange Server I created folders and test messages on the old  Exchange 2003 Server and prompted the new Exchange 2007 server to updated public folder content, test folder and email replicated with in 15 minutes.  After 48 hours then several weeks I use PDDAVadmin to get a count of Public  items in the new server and old server and notice the item count for the differences in the original document are the same. I started to manully map and look at the folders that are not matching on the old server and found out all of them are Contact list or Calenders. The items may just me entries in the calander or contact list not the same by 1 contact or 100 out of 1400 Calender items. I already now how to move Public Folders with shell and wonder if anyone else ever seen this happen. Any sugesstion how to get an accurate count or reasonable explation before I decommission the old Exchange 2003 Server?