They delivered two identical shoes, literally
You, just like Patrick Star, have undoubtedly been living under a rock if you have not heard the phrase ‘two left feet.’ This expression simply says that someone is clumsy or inept at dancing. While this is an idiom, it seems that this store took it too literally:
This person expected to receive a decent pair of running shoes, but instead, they received two pairs of left shoes. It is still not sure how this happened, and nobody knows whether they are good at dancing. Maybe ‘only 2 remaining in stock’ was plainly stated on the product page.