I dunno...I guess you go a little on a "wing and a prayer" on these chiefs. I've had no problem. I was super paranoid about it not being "cooked" too, until you consider what cold smoking is....no heat at all, just smoke flavour. If you've brined it well enough, it's already cured. Could just store it like that and it'd be fine. Smoker isn't really intended to "cook" the salmon ... and in fact, if you have bubbling fat on top, I think your smoked fish will be super dry ... as the moisture has been cooked out. Same if you "finish" it in the oven or bbq....that's baked/grilled fish, not smoked.
If you smoke in summer, I find you get a lot hotter smoked fish than if you do it in winter. I do it about 12 hours in summer, and about 24 hours in winter. Haven't been sick yet.
From what you've said, I think you aren't brining enough. Mix 1 cup coarse salt to 3 cups sugar, 1 cm layer of mix, then fish, then 1 cm layer on top, repeat til full. In a few hours, will have sucked all water out of the fish. Stir it around, move some from bottom to top, leave 12 hours minimum...or up to several days from others on this forum. After that, the fish should be firm if a thin piece or nicely jellied if thicker. If you have thick pieces, cut them in 1" strips down to the skin, so that the salt can get to the middle -- or cut them in half lenghwise (sharp knife!).
I also agree that canning should take care of bacteria ... 200 mins at 15psi means "boiled the crap out of" ... can't see what could live in that?
WWunder: go to local dump, find old stove or fridge, and take out old racks...cut to fit, and perfecto, new racks!