The building inspector is aware of the 2nd story , and my roof plans. I haven't raised the question about a permit being pulled. It's deffinatly not original , as you said earlier , the wiring used in spots is way newer. Also some old 2x4 roof joists are still in the ceiling above the kitchen. They just abandoned them there as they laid the 12"O.C. 2x6 joists. The majority of older houses in this area used to be summer cottages , which eventaly became houses and additions scabed on to additions. I'm a couple miles from lake Erie beaches.
Last night I did demo a wall . The wall with the door seperating the kitchen and dining area wasn't load bearing. What a differance. Above the wall are 4 joists , although 1 of them is in 2 pieces? The other 3 are solid wall to wall. The upstairs beedroom wall is directly over it.
As far as the double and triple joists in the living room go , I figured they did that because the length of the span? Two of the double joists are actually 3 joists on one wall , but somewhere above the ceiling one joist stops and its only a double on the other wall , so I just drew them in as double joists. Over the living room they sit on shims , maybe 1/2" , and are toenailed into the wall. They are also nailed into a board running perpendicular , I believe running the length of the walls.