At the New Philly show 20+ years ago, a guy said he had some Akro in his van he wanted to offer me. In the van he opened a wood Army footlocker that was FULL of blue/yellow Popeye patches. I have no idea how many thousands of them were in there, but it was a really, really big number. He said the footlocker couldn't be moved (and wouldn't stand the weight of the contents if moved). He begged me to buy some...."Name your price!" but I walked.
That was just one digger. The total universe of dug blue/yellow Popeye patches is HUGE. Think >15,000. and well beyond.
I think they are just errors that were dumped. Nothing more unusual than that.