I'm afraid this only explains why you couldn't change the ownership of the files, and not the reason behind the errors your were experiencing to begin with. As I said, try to narrow down when do these errors happen.
There's another thread where a user is seeing multiple folders for what should be the same drive location. I wonder if this is the same issue... for which we still don't know what is the cause or how to solve it. You might want to take a look, in case it sounds like this may be the case for you as well: