That’s not true. The case is not over until the commission decides on the review. If the review is granted they can change the decision
During the review the commission can affirm, reverse, modify, set aside or remand for further proceedings. It’s stated right in rule 411
Rule 411. Commission Consideration of Initial Decisions by Hearing Officers.
(a) Scope of Review. The Commission may affirm, reverse, modify, set aside or remand for further proceedings, in whole or in part, an initial decision by a hearing officer and may make any findings or conclusions that in its judgment are proper and on the basis of the record.