I don't think the ruling would be as Howie describes it.
 
Case 1:  On even strength, A scores on delayed penalty.
Result: Penalty wiped (aside: does player get PIM?), even strength.
Effect: 1 infraction, 1 advantage: (extra skater).
 
Case 2: On powerplay, A scores on delayed penalty.
 
 
> >     The second paragraph describes NCAA rules.  Team on power play
> >     scores while another delayed penalty is being called -->> delayed
> >     penalty is put on the board and served in its entirety and the
> >     man already in the box comes out.
> >
> >     I still don't understand how it all works together when a penalty
> >     shot also figures in, but I can at least clear up the one source
> >     of confusion.  I only know this because of a friendly argument a
> >     few years back that caused us to do some research.
>
> My understanding of the rules is that the penalty shot would be assessed
> just like a timed penalty (i.e. in this scenario, the player in the box
> comes out and the non-offending team gets to take the penalty shot).  The
> rules specify the handling of these situations generically, without
> referring specifically to a timed penalty.
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