Reviewer can not edit budget data

Summary

Budget was promoted to Reviewer, who as expects to have write access to data. But all cells on form are read only

Content

Approval Unit set up with 1 Owner (group that only has one user in it) and 1 Reviewer(group that only has one user in it). Approval unit was started and the owner was able to write to cells on the form. They promoted the budget to the Reviewer, who as expects to have write access to data.  But all cells on form are read only.  My understanding is that when the budget plan was promoted, the next person in the promotion path became the current owner and that the current owner has the ability to edit the data.