Text list control

I'm having an issue with my text list control I can't figure out. No matter what I try I can't get the thing to stay fixed to a certain size. I've tried setting the minExtent equal to the extent I want, in the profile I'm using autosizewidth/height set to false and fixedExtent set to true... and no matter what when I load the control and add text it comes out to an extent of "80 n" where n is determined by the amount of items in the list.

I'm baffled.