2) Pelinal knew who Reman was, but how many people mentioned that guys name in the third or fourth eras? Obviously, he wasn't forgotten or anything, but I just think that the fact Reman's name was on Pelinal's mind means that their association must have been closer.
The reason most people don't mention Reman anymore is because Talos has since become a much more prevalent figure. We know Pelinal came from a time when Talos doesn't exist, as such he proclaims Reman's name.