I think also it's different body types. For instance, I see from your profile you are about 5'4. I'm 5'8 and at 148 I'm a 12! (I'm jealous! That's so great! A size 4!) So if people are so different who's to say your own body can't be different at various ages? Maybe your fat to muscle ratio is much different now. Couple that with the fact that sizes have changed over the years and I could see why there is such a difference in your present and previous size.