PAL games sold in the US

[Andre81]

I have two odd games in my collection. One is a PAL Bowling sold at Hills Department Stores and the other is a PAL Berzerk sold at Boscov's. Boxes are the PAL release, even have a "P" sticker on them and the cartridges are also PAL. The only explanation I have is that they made a mistake and accidently delivered the wrong game to the stores. But wouldn't the customer have complained about a rolling screen and returned the game?

 

Does anyone else have PAL games sold in a US store in his collection?