Ryatha - my belly sounds a lot like yours..
Very hard at the top and soft at the bottom - yet all scans and doctors who feel my baby say it's head down and very low - and I can feel how low it is!!!
So I have no idea why this is the case.
With my first it was just all hard.
I imagine as the baby grows the bottom of my belly will get a bit harder but I had a bit of a jelly belly anyway so I won't hold my breathe!
I too have quite a big belly - I have a very short torso!
I do look pregnant though - my step daughter told me on the weekend that there is no mistaking I am pregnant now! Lol!