How do you setup multiple Reimbursement Action Codes for Fluid Expenses?

We are updating our system to Image 38 and will be implementing Fluid Expenses.

Is there only the one place to create a reimbursement code (Setup Financials/Supply Chain > Product Related > Expenses > Payment Information > Reimbursement Action Code) for either classic or fluid?

If just this one place, is there code for fluid to read the reimbursement action code reason setup page in order to populate Mobile Approvals Denial? I am asking because we added a second reason then inactivated the Mobile Approvals reason. I then denied a line on an expense report in fluid and approved the remaining lines. When I viewed the report via classic, the issue = invalid.