Rudi's Gluten-Free is an extension of Rudi's Organic Bakery which does bake products containing gluten, including potato slider rolls. It sounds like this might be the issue. Rudi's Organic products state 'contains wheat' under the ingredient list and are found in the bakery section.
Please let us know if you have any questions. Thanks - Maggie, Rudi's Gluten-Free Bakery firstname.lastname@example.org