I don't think there are 2 realities, the reality just changed, as it was mentioned in the post Donny sees the same people he just killed standing next to their corpses and the bullets they fired aren't just hitting the knight, they hit Amelie too.
Like PlatinumSkink said, we are responsible for reading everything carefully, what Terminal posts and what we all post so that we don't have any conflicts that result in the resurrection of enemies or other strange occurrences.