Changes nothing. The section you reference is about errors. It has nothing to do with the company canceling a trip prior to it being awarded. The section you reference in fact gives the company the ability to remove a rotation from a pilots line without pay protection. Again until a trip has been placed on your line there is no pay protection for WS or GS trips.
By the way the section dealing with pay protection is section 4F for rotations not section 23. It clearly states on a pilots line.