No. But i did some Duplicate>Instance and copy>paste stuff.
So i solved the problem by deleting a lot of shapes in the Hypergraph, then the polygons disappeared.
Then i saved my file and chose the polygon mode again and the problem was there again. Meanwhile doing all this a basic lambert was assigned to the Subdiv, wich i had to delete. So if think of the problems you have, i would say it has got something to do with Nodes and so, what i am not very familiar with, yet.
Just a german newbie, neither able to speak english nor Maya