Last ceiling to remove

Before dealing will all the stuff over the stairs, I built a temporary platform out of OSB so it would be easy and safer to work over there

Here it is after it was all removed

So based off of everything I've seen it seems for the 2nd floor, the only original part is from the front room, back to the wall between the master bedroom and bathroom, and only as wide as the front room.  It also explains why there is that one load baring stud that didn't seem like it should be.  More on all of this later, here's an inside roof with shingles still on it