I tried on a new pair of the same size. They were huge. I bought size 32-34. They fit fine. Did my waist shrink two inches in the five years since I bought the last pair? Not likely, I weigh 4 or 5 pounds less, but that's not two inches of waist size.
It turns out Gap has joined every other retailer in shrinking putting smaller size labels on larger clothes. So the 32 waist jeans I bought today are about the same fit as the 34s I bought in 2006. We live in a fat country. Maybe in 2016 I will buy 30-34 jeans.