InfoPath Dev

I have a repeating section and under that I have 3 sections and a dropdown. I want to show only one section at a time on a selected value from my dropdown. This stuff is done successfully, but the space or size occupied by my repeating section remains same even after the other 2 sections are hidden....

I'm fairly new to this - what I'm trying to do seems like it should be very simple, but I can't get it to work. I have an InfoPath form that is published as a site content type to my Sharepoint site. It is used to send submissions from one team to another. When the form is initially filled...