Summarise a Long-Running Tabletop RPG Group's House Rules Document

Four years of house rules have accumulated in a shared document nobody has cleaned up, and a new player is about to be handed the whole mess. This sorts them into genuine rule fixes, group preference, and rules that may no longer earn their keep, and flags any two that quietly contradict each other.

Paste in the accumulated house rules document below for a long-running tabletop RPG group. Summarise it into categories: rules that fix a genuine gap in the official rules, rules that exist purely for group preference, and rules that may no longer be needed. Flag any two rules that seem to contradict each other.