Voldemort "intentionally" makes Harry a Horcrux! - I've got it!

[Amanda Shoffner]

No: HPFGUIDX 146409

  Gwen:
  <snip>I think I've got it!  What if the soul-bit leaving Harry did not vaporize LV, as I originally thought?  Then, LV is standing there, everyone dead and his Horcrux failed.  He would be angry knowing his Horcrux attempt failed and his soul-bit was lost.  In his rage he cuses the destruction.  He would *then* have tried to AK Harry.  
Then what follows falls into place exactly as he states at the end of GOF - the protection that prevented the horcrux from residing in Harry also causes AK to rebound.  
<snip>

  Amanda:
  Just want to say that I think your theory was well thought out. Sounds like that's the most logical, at least until we find out what really is going on in book 7. If this is so, then the rejection of the horcrux left the mark, and the AK is just as stated in the books as not leaving any mark. They tell HP that a scar like that comes from being hit by a curse, they never say that they know for sure that it was the AK, they would not know because nobody has ever survived it before.
  ~Amanda