The Command Tunic from the new TOS pack has the Captain rank on the shoulders and it can't be removed. I don't think they understood that it's his Captain's rank. If you pair this with a different rank on your sleeves, you now have two different ranks showing!
True enough, very good catch:
The shoulder rank clearly has the two solid braids and the single broken braid segment indicating captain. This means it would be simple to replicate the other ranks onto the shoulders. (Though it might not look so nice, depending on the rank.)
However, the ranks on the wrap tunic are displayed either on the shouldersor the cuffs, not both.