Is it true that the 3 musketeers and milky way wrappers were switched when they were first made? I thought I learned this at the Hershey museum itself, but snopes says that's false.

Three musketeers and milky way bars are Mars brand chocolates, not Hershey brand

That was not discussed while we were there, and I didn't see that info at any of the displays. Try to contact them directly.

No idea and we were just there this weekend

That was not a topic we discussed with the museum history buffs. You may be able to them directly and asl the question.