I don't know the answer to the first question. If @GeneJackson95 is ever trolling around the board and wants to chime in, I will leave that to him.
As for the second question, I know they are at least back on speaking terms as they are making convention appearances together (when Jamie shows up) and have made appearances at a few shows around the Memphis "territory" to sign autographs, etc.
I actually got to meet Wolfie back in March at a show in Ohio and told him how much I enjoyed the book, and he couldn't have been more appreciative and seemed genuinely touched that people were enjoying his story.