I had this same issue a few time too. Ordered five 3-packs. Receive one three pack, and 4 singles. I am convinced a robot just snags "one of each" from a bin

I had this same issue a few time too. Ordered five 3-packs. Receive one three pack, and 4 singles. I am convinced a robot just snags "one of each" from a bin, and if some packs are broken apart and separate... then they meet that logic.