The buttons turn into huge blue blobs as soon as I turn them into radio buttons. Before changing them, they had no fill and a red stroke of 1 pt. Why is the formatting wrong? It should just continue to have a small red stroke and add a small black circle when selected as a radio button.
You asked in the generic Cloud forum... what is the actual program?
Well, you might try it again. Undo back to the red stroke, select the three buttons, and change the Type to Radio Button. Might as well name them while they are selected, because radio buttons need to all have the same name to be mutually exclusive.
If they insist on turning into big blue blobs, then zoom in and double click (or Control/Cmd click) to select the outer eclipse, and change it back via the Control panel. You just have to work a little to get the correct selection.