Picked up two 2032s, and confirmed what I expected to see, and it is exactly what Xalius saw.
Installed as per the imprint in the case, you have the two batteries in parallel bucking each other. Couple tenths of a volts at the terminals, as one would expect to see.
Flip one, so you have battery polarity the same way, you now have the two 3V batteries in parallel, and of course have 3V at the output.
Definitely appears, as was originally stated, the battery case is mis-marked.
Installed as per the imprint in the case, you have the two batteries in parallel bucking each other. Couple tenths of a volts at the terminals, as one would expect to see.
Flip one, so you have battery polarity the same way, you now have the two 3V batteries in parallel, and of course have 3V at the output.
Definitely appears, as was originally stated, the battery case is mis-marked.