Step away from his drama. Until he's made up his mind as to which one he wants to be with permanently, then he wouldn't be cake eating at my house. He's the drama king and he needs to figure out what he wants and clean up his mess. If he opts to return to you too soon, then he'll continue the current MLC at a later date.
Mighty, he reminds me of a teenager, relying heavily on "mom" to listen and fix his problems for him. You are far to available to him and he needs to realize that you are divorced and you do have a life of your own and are living it. He needs to see that you are moving forward and are taking care of you and your children. If he wants to spend time w/the children, that's okay, but he needs to start taking them to his place and spending time w/them. He needs to be taking them out by himself and actually feel the loss of you. He can't do that if you are readily available and doing things w/him as a "family" unit.
Mighty...it's time to set those boundaries and adhere to them. If you don't, he'll continue waffling and cake eating until someone stops the merry-go-around.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.