I think I'm struggling to see where they were unprofessional. They made an initial decision. This decision was appealed against by Salford. The appeal was heard, dismissed and a revised punishment was given.
Sounds quite professional to me and is the kind of thing that regularly happens in relation to player bans where they appeal against a decision, only to have an extra game added to the ban because they appealed.
Timing wise its not great I agree but it has to come out sometimes