I recently registered all of my Titleist clubs (Putter, Irons, 3 Hybrids) through the website. I used the "engraved" alpha/numberic code on the clubs; on the hosel for the irons and on the bottom towards the heel of the 910H head. All of my iron had the same code, which made sense as I ordered them custom.

However, I was a little surprised that two of the 910H had the same number. I did not order these custom. I bought them at the same pro shop a few months apart, so it is possible the shop ordered them at the same time. So, my question is should these numbers have been unique on each 910H?

Thanks in advance for any replys.