>ALL boards use the same SALT for tripcode generation
Correct. In fact the first time I posted w/ trip was on /test/. I then started posting notables using trip on /qrb/, and finally I started posting notables on here using trip. Has always been the same since back then.
I already contacted BO, BO has not changed any setting and that makes sense, because the site is giving a different tripcode back, despite my secret being the same. That's what it's blocked, because on these 2 boards, there are tripcode whitelists. Tripcode different and board blocks it.