I did see an issue you probably didn't that would create random odd results,
but that stems from the bigger issue.
The bigger issue being that you are improperly using a radio button.

A radio button is designed for a yes/no answer to a question, not for
multiple selection.

If I ask the question "is my name David" then I use a radio button "group"
of 2 radio buttons that allow only the yes OR the no to be selected.
Or I could use a group of three that respond Yes, No, Maybe. But only one is
allowed to be selected. Selecting any one of the three deselects the other
two. That is the design of a radio button and a radio buttons "group"
membership.

If you ask the question "what time frame can I work" and you give me four
possible time frames to choose from and you only allow me to select 1 from
that 4 then you use a group of radio buttons. I can only select 1 of the 4,
any selection deselects the other 3.

If - as in your usage - a multiple selection is allowed, where I can choose
to work any or all of the possible options then the correct form control to
use is the checkbox.

Your form has some radio buttons that are grouped and some are not, which I
doubt you even realize.

I strongly recommend you redesign the form top to bottom. If only one answer
is possible to a question then use a radio button group. If a question can
receive multiple selections then use a checkbox on each possible option.

David Bartosik - [MSFT MVP]
www.publishermvps.com
www.davidbartosik.com