Entity Framework telling me an object is attached when it isn't - why?

Well, I've worked through this and found a solution, but I can't say I understand it. The crucial ingredient came when I was performing a check after the comment by @Slauma. I wanted to check I was using the correct entity set name etc so I included the following lines near the top of my AttachToOrGet method.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.