Symptoms

Switch order of (Last Name, First Name) to (First Name, Last Name)
 

Diagnoses

You can do this using inline functions in the Workflow Designer, and expressions in Smartforms.
 

Resolution

Here is the Inline Function used: Display Name = Trim(Mid( string, Find( string, ,) , Length( string ) ) ) Recreate this exactly how it is in the Expression builder and you should see the correct behavior.