OK, wanted to post an additional item I am seeing between your version and mine, other than the spacing issue for the checkbox. When looking back over the image I just posted with your XML code and of mine I did notice something I did not really see before. The tabs at the top or in a different location for mine than yours. So, to see who's was off, I re-downloaded from the updater to see what it looks like. And the tabs look like yours. So somewhere one of the areas where I changed a location reference I may have changed one that was not needed. That would possible explain why the are in a different place for me.
Did not hurt anything, and does not explain why you are seeing "chunks of missing data" as I took nothing out
no did I do any form of formating the XML.
I still may tinker with my changes to find out which of the 10 changes I made moved the tabs to a new row. Interesting, as that was not the intent.