As I think I wrote somewhere on this thread, my assumption is that the ticketing system is not flexible enough to display only the value that is relevant to each fan, so STHs and non-STHs alike see both, which is only going to serve to confuse.
I guess that giving both sets of figures *could* allow the club to prioritise a match or two to non-STH ahead of STH with few points, although I can't see it happening.