I'm 5'5.5" and right now, outside the 'ideal' weight. My normal, easy to maintain weight is 130lbs - but I have a VERY small frame, not a whole lot of muscle, etc. If I had more muscle I think I'd be okay with a slightly higher weight - but I tend towards not being/keeping much muscle.
I definitely agree those sites don't always take into account body size. My little sister is only a couple inches shorter than me, weighs the same amount - but wears a smaller size clothing. Who knows? I honestly just want my clothes to fit. If I get to that point, I don't really care what the scale says!