Before it gets locked, can you offer any clarity on whether the MOM finally acknowledged fault for unreasonably expecting you to stay and play when you had other plans? Or did he at least express an understanding as to why you felt you did the right thing by leaving? I'd be concerned if, after all that has gone down, this guy still doesn't "get" that you weren't in the wrong. (I'm not advocating that you beat a dead horse and argue your point, plead your case, defend yourself or anything like that... just wanna know if he "gets" it).
Lastly, clearly, he (and the pastor) is of the perception that you have a problem submitting to authority (which is often just the leader's way of expressing his/her own ego issues, and usually accompanies the abuse of authority by that leader). When the two of you met, were you able to resolve that? It's important to be on the same page when it comes to matters of authority.
All in all, I'm glad it's working out for your favor. If I were you, I'd request that letter be removed from your employment file.
And uhhh yeah... the grammar and typos in that letter were horrendous.