Hi, Paul, and welcome!
I haven't quite had the same thing happen to me, but one of my "invites" who used a gift certificate ended up being listed as the person who invited me (probably because I checked up to see if she had used the certificate I sent). No big deal.

Also, Kiva can't possibly keep up with the way these recommendations really play out. My biggest "success" will never be recorded. It was a word of mouth recommendation. My friend took me up on it and gave a gift to the grandchildren of his lady friend. She, in turn, used his generous gift in a special way - she had the grandchildrens' teachers make the money be turned into class projects, so that many children learned about Kiva and how it helps people around the world.
Does it matter?

Not at all! I'm delighted that my recommendation had such a positive effect, and care not a hoot who does or doesn't get the credit for it.
Again, welcome, and keep on posting! Cheers, Glenda