Your complaint is one serious reason I list what is in my kit in the kit description. I also invite customers to email me if they have a question about contents. For me, my kits are very often too big for you to see everything that is included in the previews. Lots of bang for your buck. When I spot an element in a layout that I love I look closely at the previews to see if I can spot it, if I can't, I contact the designer to ask. From the point of view of a designer, it is very hard to 100% control what your creative team puts in their layouts - imo they work very hard to create beautiful layouts in order to have free kits often spending hours on just one layout - however I do try for the most part to not show layouts with journal cards from an add-on pack etc with the kit's sale page.