Rating field BUGS

I have used the Rating field (10 stars) a number of times in the member registration form. I have checked “Is this field required?”, and if they’re not filled in, the form submission fails (correctly) but with NO error messages. The checkbox field, for example, has “[field title] is required”, but the Rating field does not.

Also, when creating a Members form, to view members, you can select fields to display for each member. All my fields show up in the drop-down box EXCEPT for the rating fields – so you can’t display them on the Members page.

Are these bugs, or have I misunderstood how the Rating field is meant to work?

Thanks,
Julie