Weird that they kept it. Before I got my braces they pulled all my baby teeth. I still had 5 in there at the age of 24!
Wow 5 is a lot! And I thought I was special because I had 1... it's great finding others I have this in common with, though. As for me, they pulled my baby tooth, but it was closer to the front of my mouth (in my bottom row). My gums were also starting to recede from it. You should ask your orthodontist when you get the chance--he/she would know better than anybody else