jamoliso

I might be wrong, but I think you are confusing mist snapping with regular allomancers. Mist snapped allomancers, have to my knowledge never yielded mistborn. Those only came about from descendants of the noble houses (Vin and Kelsier) or from non-allomancers burning lerasium (Elend original 10 nobles created by the Lord ruler). As far as we know, mist snapping doesn't occur anymore (the new mechanism for snapping in era 2 is not known) so all of the allomancers we see are descendants of the noble houses that already existed before the Catecendra.

From my understanding, there is land in shadesmar where there is land in the real world. It is simply covered in all of the souls of thing and organisms from the physical realm to the point where it seems like an ocean of beads. Anybody can correct me if I am wrong, though. I am not 100% sure on this.

Hi, longtime Lurker. I might be unaware about some word of Brandon, but where has it been stated that the everstorm won't hit Urithiru? The city is clearly built in a way to show that it experiences highstorms. The only reason it hasn't been hit by the everstorm is because the Parshendi unleashed it in the Shattered Plains which are east of the city. Although, maybe part of its holiness is that the city has some kind of investiture that prevents the everstorm from affecting it.