Seems that you never send kids to shop for you.
Well, my kids aren't old enough for that. I would tell my kid to only buy specific companies if I thought they're not old enough to understand posters about Cholov Stam.
Besides, the Cholov Stam fridge is near the freezers and has a relatively small selection while the Cholov Yisroel is on the opposite end of the refrigerator dept and has a much larger selection (at least last time I've been there). My kid would probably buy cheese that's next to the eggs and orange juice.