Voldemorts wand and Olivander

[Trinity61us at aol.com]

No: HPFGUIDX 53329

I'm not sure in this has been discussed to death in an old thread 
(puter...stubborn) so bear with me please!

I was just watching SS for the millionth time and something struck me, and I 
had to go look it up in canon.

<"I remember every wand I've ever sold, Mr Potter. Every single wand .<snip>
<It is very curious indeed that you should be destined for this wand when its 
brother-<why, its brother gave you that scar."

It is common knoweledge that Harry's wand's brother gave him the scar, killed 
his parents, etc. So shouldn't  Olivander have told someone that it was Tom 
Riddle's wand? It is obviously still Voldemort's wand because we see that in 
the "priori incantatum" in GoF. V could not have sent a lackey to go buy one 
, because "the wand chooses the wizard".
Thoughts please?

Alex, hoping for no flaming howlers for an old thread!