Theory about Priori Encantatem discrepancy

[skywalker1 at ibm.net]

No: HPFGUIDX 1530

Hello all,
   I've only recently joined and wanted to introduce myself.  As an 
adult and a huge Harry Potter fan, this site is just what the doctor 
ordered.
   Anyway, I also have been puzzled by the order Voldy's victims 
emerged from his wand.  Well, it suddenly occurred to me today that 
perhaps Lilly and James knew that Voldy was after Harry and took some 
extra last minute precautions to protect him.  What if James gave 
Harry a polyjuice potion so he looked like James and then James drank 
one himself to look like Harry?  That way Harry would be protected 
since Voldy wasn't after James.  The way I envision it, Lilly and 
James are interrupted before they can hide Harry and Voldy attacks 
Harry (whom he believes is James) seeing him as his biggest 
obstacle.  Lilly (knowing it's really Harry) tries to protect him 
(the reason for the screams that Harry hears when the dementors are 
near in PoA) but the spell hits Harry and is reflected by the charm 
of his mother's love.  The force of Love from the reflected spell 
builds inside Voldemort and, like matter and anti-matter, explodes 
killing Lilly and James and nearly killing Voldy himself (Harry being 
still protected by the charm).  So Voldy thinks he killed James first 
but, assuming Lilly was near Harry trying to protect him, she is 
closer to the blast and is killed first (admittedly by a split 
second).
   Now I realize this theory has a hole or two in it.  This is all I 
could work out after about 30 minutes thought.  Anyway, I'd like to 
hear what you all think.