Your ability to keep plugging along is amazing. I love how this job search is pumping up your PMA. I'm sorry it is getting a bit old, and you're getting tired. But its just for a bit more, and you'll have the great benefits of a good job and a location that better suits your goals/interests.
I felt it when you described your upset over S9 missing out on his dad. S5's pain gets to me most as well. I imagine that its important for those of us LBSers with kids to acknowledge our own pain/loss as well that come about from such WAS actions.
Your ex likely feels very torn about which kids to spend time with, and this may be very confusing for a WAS with the guilt/self-centered focus thing going on.