It works both ways, how much did UPS spend on bringing the sups, managers on each grievance there only to have them deadlocked. A deadlock is not a loss for the union, a denied grievance is. A deadlock means the sides disagreed on the griveance and now the union has the option to arbitrate.
I believe they can go to arbitration regardless of going to the national panel if they wanted to, besides the money the company spends does not come out of your pocket like the union dues do, probably time for another increase