When you hve your baby (milk) teeth, are there more than one adult tooth lined up behind it?

I am 33 but I have 2 baby teeth still in my mouth. One of them has recently become wobbly. The adult teeth that were meant to come through when I was a child actually csme through the roof of my mouth and were removed. I am wondering if there is another adult tooth breaking through causing my tooth to wobble. The other baby tooth I have is fixed firm with no sign of a wobble. My husband said he read somewhere that you have more than one adult tooth lined up behind baby teeth, I have never heard this before. Any dentists out there??