It seems like if your name (or the first few letters of your name) are similar to someone else's, they give you your bib number and you can click on your name. If your name is so different from any others, it just says "congrats!" and lists your name without bib numbers. I say this because there is another runner with my last name, so I know my bib number. Our oldest son's last name is different and unusual, so when I put in his name (or even the first few letters of his name,) then his name (and no bib number) is the only thing that shows up.
That said, if corrals hold from 2015, I'm in A. Except I'm running with my son, so his bib number is the important one for practical purposes!!!