I remember you writing that you wondered about Stanley's back story...how could he have ended up alone, etc. It's something we wonder about each of the dogs we've rescued. It's when you really wish the dogs could talk so they could tell you about their past life. Did they miss their former family? Are they glad to be away from their former family? What was it like in-between the former family and you... It's something that's with us all the time. We always just hope that we are giving them the comfort, attention and love that they deserve and that they are happy to be with us.
And it is not an uncommon thing for the dogs to be "different" a long time after than when they become part of the family. We are told all the time by the rescue group and by our vets that we will be discovering a dog's true personality for months after they come to us. Often, they start out on their "best behavior"--actually, they are just a little stiff at the beginning of the relationship as they are learning the rules of the house (what's allowed, what isn't. What's expected...). But then, as they become more comfortable and more used to their surroundings they start to become their true selves and test the limits. But that's usually a good thing because they are that much more relaxed and happy.
I LOOOOOOOOOOVE that picture of Stanley with Monty's toy. He's down in "play" position (butt up, front end down) and tail furiously wagging. Soooooooooo happy that his people have come home.