yeah, I forgot about that.
Here are your options:
the Userform automatically assumes
that any option  buttons in a single "frame" are part
of a group, even though the group isn't named.
You can put each button  in a separate 'frame'
and change the border color to the same as your background,
remove the frame name.
or... user  Checkboxes instead of option buttons.
BTW: your code looks right.