You have merged multiple source accounts (from multiple source domains, for example) into a single target account, and these source accounts all have profiles on a single source workstation. Only one profile can be associated with the target account. Which one will RUM use?
The profile of whichever user is further down in the vmover.ini file will be associated with the target account. Since this file is based on SIDs, it will be whichever source user was created last.