When you try to update a multivalued attribute (like employeeStatus) on the Object Template it doesn't replace all values keeping the old ones. The steps to reproduce it are very simple:
1. Add this mapping to the Object Template which maps the givenName to the employeeType
2. Create a new user
3. It should have his givenName as employeeType
4. Add manually a new employeeType (i.e.: MANUAL_VALUE)
5. Change user's givenName
He should have one employeeType but he has the givenName and the MANUAL_VALUE. I also tried adding strength strong and relativityMode as absolute but nothing worked.