Never ran into anything like that, but one thing i thought was a bit odd today at the LHS.
I ran across a particular kit on the shelf that had my head scratching. It was a Mig 21, if i remember correctly. I wasn't too interested in that kit at the moment, but pulled it off the shelf anyways, cause it was an older kit. A Revell from the late 80s or early 90s. I just wanted to check out the box art. But upon examination, i noticed that they forgot one little detail- nowhere to be found on the kit was the scale! It was kinda an inbetween sized box, so i had no way of telling. I just woulda thought that a mistake like that woulda been noticed at some point being on the shelf, ya know?