Nope it isn't you. They decided to age them to make the plot more interesting. Don't you remember less than 2 years ago Jamie and JR were 16 and now they are supposed to be in their early 20's. Bianca was born when I was 15 for the love of Mike!!
That's just how they do it on soaps.
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"Whatever you are, be a good one." --Abraham Lincoln
Yup I know, I have to keep reminding myself that its a "Soap Opera" and they exaggerate a lot in some things! I'm so glad they aged J.R and Jamie, Hot Guys! Aiden still my favorite though!