As for frame size, people like different fits and it is to do with all sorts of things like proportions, flexibility, habit, preference, engineering, ruling bodies and inevitably fashion. Your height is only one factor, more importantly it should be split between inside leg (proper, the fact you wear 32" leg jeans or whatever is not an accurate gauge) and torso length.
That said, factor in that track bikes don't fit quite like road bikes and that you probably aren't that worried and we are probably back to where we started.
As for frame size, people like different fits and it is to do with all sorts of things like proportions, flexibility, habit, preference, engineering, ruling bodies and inevitably fashion. Your height is only one factor, more importantly it should be split between inside leg (proper, the fact you wear 32" leg jeans or whatever is not an accurate gauge) and torso length.
A good place to start re the complicated and by no means absolute world of sizing is
http://www2.bsn.de/Cycling/ergobike.html
That said, factor in that track bikes don't fit quite like road bikes and that you probably aren't that worried and we are probably back to where we started.