Yes, I agree it's all very odd! I just love your response to her invitation (in disguise) with "Yum!", then leave!! LOL!!!
About your earlier post, I was gonna say that we (LBS's) all seem to get hung up on progressing the R one way or another. When my W sent me that long email saying that I was "looking great and probably ready to date", I told her that I am not waiting around, but I am progressing my life in every single way except starting a new R with someone. And that's just because I am not interested in a new R right now. I am concentrating on spending time with my boys. I know I will be happy again in the future one way or another, with my W or someone else, but right now I don't need a new R.
The point I am trying to make here is that I remember reading a post from you saying basically the same, that you are not interested in a new R. In that case, there's no need to push your M in any direction, towards dissolution or reconciliation. Just concentrate on carrying on in every single other aspect of your life. You don't need to decide right now on what to do.