So it looks like you are just having issues with channel assignments. I actually use absolute mapping, not end of model. What I do is make a spreadsheet with my controllers. I define my outputs on my controllers and then my model channel assignments. My advice, start here. Make a list and define what you have. Then it's as simple as plugging the numbers in your layout.
I was able to make changes to your layout without crashing. I thought I read one of your posts which stated you couldn't make changes without crashing. If you want, I can go through your layout and fix things. The great thing about xlights, you can change the mapping anytime you want and it will not effect your sequencing. So, you can just throw garbage numbers in there and then come back later and put the correct numbers in. So, yes, you can start sequencing now and come back later and make things right.
James