Horcrux problem

[charon_death_ngfh]

No: HPFGUIDX 144446

I have just re-read HBP for about the fourth time when the following 
occured to me -

What if there are more than seven horcuxes?

Dumbledore said that he thought Voldemort intended to make Harry's 
death count towards the seventh and final horcrux.  What if, somewhat inadvertantly, Voldemort made Harry the seventh part without even realising it?  I know this theory has been bandied about, quite often (forgive the pun) to death but Voldemort pretty much murdered himself with the AK curse.  Dumbledore had already said that when a horcrux is created it leaves a mark.  I suppose Harry's scar could simply be just that a scar left as a visible reminder of what happened to his parents but what if it is more than that?

Voldemort may not even realise what has happened, after all the two 
wands with the same core reacting against one another seemed to 
surprise Voldemort as much as Harry.  It could be that the AK curse 
reacted with Lily's protection of Harry and accidentally created an 
8th horcrux assuming that Nagini is as Dumbledore supposed, the 7th 
horcrux.  If Nagini is not a horcrux it would make Harry the 7th 
which presents a bit of a problem.  Assuming I am correct, which I am probably no where near, it will mean that Harry will have to destroy himself to completely destroy Voldemort.  

Consider that Voldemort chose objects with care, he wanted an object 
from each of Hogwarts' founders.  He had Slytherin's locket and 
Hufflepuff's cup, we assume he found something of Ravenclaw's and he 
was left with trying to find something of Gryffyndor's which is what 
would have bought him to Godric's Hollow.

I am assuming since James was rich and was pureblood he was living in Godric's Hollow because he was the last in the line of Godric 
Gryffyndor.  Originally LV was going to use something from the house 
as his final horcrux but this backfired somehow and Harry became the 
horcrux.  It is the only explanation as to how Harry shares talents 
of LV's, that could only happen if Harry had somehow absorbed some of LV's soul.

It makes you think though doesn't it?

charon_death_ngfh