The ARCserve D2D Web User Interface shows incorrect session count (Number Of Recovery Points) in the Summary Panel. It was caused by an entry in backupinfodb.xml which was not removed properly after a session was purged. This article provides a soution for this problem.
Goto the backup destination folder of the server which has the problem. Rename backupinfodb.xml to backupinfodb.xml.bak. Refresh ARCserve D2D Web User Interface, this file will be rebuilt and the session count will be corrected.