Priori Incantatem and the misplaced spell

[katssirius]

No: HPFGUIDX 155222

I was re-reading GOF in the midst of the Harry as horcrux discussion
and I wonder where is the spell that should be between Bertha Jorkins
and Lily Potter.  Shouldn't Voldemort have come out of that wand since
he killed himself accidentally.  Is this an oversight by JKR or was
another wand used?  It also occurs to me that in Book 7 Voldemort is
going to choose someone else to kill Harry, either Wormtail or Snape,
to avoid the reoccurance of priori incantatem.  IMO, each of them has
some kind of karmic debt to Harry.  Snapes's is unknown at this point.
Any ideas why this misplaced spell did not show up while they were
encased in the golden web?

katssirius