Enrollment Rate Table needs to allow modifications to Formula

When Plans are moved from the Live to Enrollment Tables you can't modify the Column Formulas, you can only change the Rate Table.  Many of these formulas are based on static dates which need to be different for the Enrollment Rate Tables.  Currently you have to change the Live Rate Table, not update the Employees, Delete the Enrollment Plan, Add back into the Enrollment Table.  Then go back and change the Live Table.  This is a workaround but very cumbersome and has the potential for human error.