Labels and text boxes change size

This is with ASP.Net VB and it is really hard to explain or understand.  I have columns of labels and text boxes in a div.  They are set to height 18px.  When the page opens they appear to increase in height from the way they display in the .aspx page in .Net.
That is OK by itself.  But here is what happens.  They are referenced in a data bound list box.  When I click on the record in the list box, they increase in size just as they do when the page loads.  However, when I update the record, they get smaller!
Again, I know that this is hard to explain, but you should be able to test it here.  Open the page.  Then click on the record Test Text.  Then click on Update.  Watch the text boxes shrink.
http://www.qqonline.info/InfoThor/VaSale.aspx
Any ideas will be greatly appreciated.