I once worked in a hot sauce bottling plant and I would trust the labels. On a normal day those lids are the right size and weight for employees to spend the day throwing at each other and it would be easy for a few to end up in the wrong box or hopper. Or they could have received a huge order they were contractually required to fill in a certain time and didn't have enough "correct" caps on hand and received permission for a substitution. Labels on the other hand came in rolls of 200 - 500 and applied by machine. They would be check by the material handler, line supervisor, machine operator, quality control, shipping department, and finally the retail shop who would accept delivery.