Within the last few years, we have updated the structure and durability of our flex-bow tents. With these changes and when coming out with our vestibule accessory, we needed to have a product that could accommodate those who are buying a new tent with a vestibule, and those who may have the older version of the tent that would like to purchase a vestibule as well. We have found that having two vestibules in our product line, that can be adapted to fit multiple needs depending on age and size of the connecting tent with just a few quick grommet placements, rather than 3-4 different vestibule styles is more cost effective for both us and our customers. Hopefully, that will help make sense as to why we ask that customer’s place their own grommets, though we are sorry for the inconvenience and frustrations this may have caused. We have tried to state it clearly in the product description and owner's manual on our website.