RPAGE saving in interrupt

[Darryl]

I'm using CodeWarrior Development Studio for HCS12(X) 5.9.  I access paged ram from interrupts, so I have the -CpRPAGE option specified.  The resulting code at the start of the ISR is:

LDAA 0x16

PSHA

PSHA

I understand the first PSHA in this code, but what does the second PSHA accomplish?

Thanks