Issue with overlayed Panels

I have an application that has a set of panels that when they are layed out end to end on the same page work perfectly.  If I try to do .Visible=true/.Enable=false with these panels based on a set of Radio Buttons, the panels display correctly, however when I click on them it seems that "state" from the other hidden panels is adopted.  What I don't understand is how it works perfectly layed out on the page end to end but stop when the panels are being hidden and activated by a set of radio buttons.  So, basically what I'm doing is .Visible=true/.Enable=true when a certain radio button is selected, doing .Visible=false/.Enable=false for the other panels.  This effectively "swaps in the correct panel" based on the radio button selection. 
The code below shows that my "main panel" I'm swapping out would be pnlContentSection_1, pnlContentSection_2, etc.  These panels contain a lot of sub panels as you can see and ...