I was wondering do you have access to all three skins or only the skin that goes with the specific MM ship you bought?
You only have access to skin options for the model you bought. You'll have to buy the other two to get all three.
Quite the bummer, since I like the look of the Engineering Vesta best, but the console of the Science vesta is more useful. I ultimately went with science, but my heart aches for that kickass rear hull.