Business Rule based on Assignment Category and FLSA status

Summary:

I am trying to create a rule based on Exempt/Non Exempt along with Assignment Category to default the field Hourly Paid or Salaried on Transfer and Promote. However, I am not able to get it to default. Each time I try to type in one of the Assignment Category values (Full-time regular, Part-time regular, etc.) it blanks out the rule or says that value doesn't exist even though it does for the Assignment Category field. For the exempt status I am able to type in Exempt/Nonexempt but its not defaulting either. Can anyone help with this?

Content (please ensure you mask any confidential information):