Irrational Supermarket Discounts

We were at Cold Storage Jelita this afternoon and I noticed special offers that don't make sense. Of course I would buy two packs of six instead of a box of twelve isn't it? I spot this sort of mistakes all the time.

Well you might say the packs of twelve aren't on offer. Then might as well not sell them. Some shoppers would mistakenly pick up the poorer offer and they might discover and complain. Not a good idea.