Is... is this image correct? Since it has the bronze drops of worlds 1 and 3 and 5, which seems... odd? If for nothing else, because world 7 is silver drops again.
And when you exchange a slvl20 Soul weapon, do you lose the +99 on it?
It's right. There are different materials from different chapters.
...and I should think so, I doubt you'll be able to keep +99 on a weapon once it's completely traded for something else, but I don't know for sure.
selling brand new account with L/E SSR and full plus more fire team.