Hi mpwalsh8,
First of all, nice plugin, knew somebody would have done this already so i can save a few hours coding one.
Not sure if you know this constraint in php, and i assume google form use python so they use name="entry.8.group", but for php it needs to be name="entry.8.group[]", otherwise php don't know it's an array of value, but take the last value of the group instead.
This is why when i got a checkbox group vote it only take a last value as result. :)
Also for building the select list, it should be selected, not checked.
Regards,
bitinn