Form field deselecting radio button

Have a radio button when triggered to display a business card as either single or double sided. When single sided is selected, it displays as it should. Moment information is keyed into the fields below it; the single sided button deselects itself. Double Sided is unaffected and are linked to each other.
Any idea as to what may cause this?
The radios do trigger hidden fields where some of the fields below would display in a cards preview window.
