So I just received my recent order from the 'Salt Cave' and was looking at the Women's Rowing Issue and for the life of my 30-45 minute look-see I could only see 2- designs of the stated 4-design issue. Then the light dawned. In both the Red Team & Blue team there is one stamp with a cut off oar from either the back rower (red team) and the front rower (blue team). Both rowers are pulling from the port side. I would have thought maybe the design was the coxswain & rower and the second design was 2-rowers, I will note that the 8-woman crew repeats on both teams. If the USPS had changed headgear or hair style on the other six rowers they could have had 8-designs on the issue (or even 10 if the design included the coxswain.
NOTE: The rowers are actually pulling on the RIGHT side as the coxswain would be facing forward. The rowers are pulling from THEIR left side.