I have confirmed this is an issue IE8. In Firefox it works just fine. I enabled the DID access to one of my test customer groups to review the functionality and when a user clicks on the actual words "Buy New DID", "Add Phone Number to your DID" or "Release DID" the page updates and everything works as expected however if a user clicks the radio button (as most would) it acts more like a checkbox rather than a single select radio button and nothing happens other than placing another dot within the selcted radio button.
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