HBP: Discrepancy with timeline, help

[Amanda Geist]

> Amanda Geist wrote:
> >
> > Okay. These don't add up. Lord Voldemort's downfall was the direct
> result of
> > learning of the prophecy, when he killed the Potters and got all
> rebounded
> > on.
> >
> > If Snape rejoined our side before V's downfall, wouldn't he
> already be on
> > our side at the time of the interview? Why would he have been
> spying at all,
> > and why would he have carried the prophecy back to V? Unless
> Dumbledore was
> > lying to Harry?
> >
> > If Snape didn't rejoin our side before the Potters died, was
> Dumbledore
> > lying to the assembly?
> 
> Pip:
> No, they do add up. Trelawney made the prophecy before Harry was
> born.
> 
> Then it took nearly a year after Harry's birth for Voldemort to find
> the hidden Potters

No, they don't. Because according to this book, the event that pushed 
Snape back to our side was remorse about the *outcome* of his 
reporting the prophecy. That outcome was the attack on the Potters--
but that was also Voldemort's downfall. So how could Snape have come 
back to the good side, before Voldemort's downfall, when it was the 
events of that downfall that caused the remorse?

What am I missing?

~Amanda