How to reproduce:
Play one game.
Then start new game, without exiting Elemental. <- this is important
After that, all designs from first game will be in second, even basic premade peasant and pioneer will get doubled.
If you do start new game like dozen of times, without exiting the Elemental, at the end you'll get flooded with unit designs.
Happens in both 1.05 and 1.06.
