I used to import tubes. My supplier produced 700c tubes in 7 widths, so their OEM customers could have the best possible easiest to mount fit. Of course I wasn't going to stock 7 sizes, so I picked 4 widths and had the boxes marked for a size range.

That's how the tube world works, The tire/tube company let's the client buy whichever he wants, and put anything he wants on the box. What's surprising is that a single source had 2 such similar marked sizes in stock, but more that he was so tactless to send 2 different boxes to fill a single line on an order. Even if the tubes inside are identical, why invite questions or concerns.