It makes sense if you do the math. The post that you quoted was from January 2007. So her being 20 in a 2007 post and 23 in more recent 2009 posts adds up. I haven't seen the post where she says that she's 21, but if the "I'm 21" post was made sometime during 2007 I'd have no reason to think that she was lying.

Hi. I am currently 120pounds at 5'2. My goal is to lose 15 pounds and get down to 105 pounds. I want to decrease fat mass and increase musclee mass. I can really use much support and advice!

Hi!
I'm 5'8 and currently about 145 lbs. I'd like to lose about 20 pounds but I'm in desperate need of a buddy. I'm a positive person and quite motivating if necessary. Also strict when it comes to getting things done. Hopefully someone needs a buddy like that.