User blog comment:ChiroSamai94/so is Strong World canon?/@comment-1055368-20110205125401

In regards to Luffy's 400,000,000 bounty, the World Government probably didn't want to include Shiki's defeat. They fought that the World would be shook if they knew Luffy beat Crocodile so if the entire world knew that Luffy defeated the legendary Shiki it would probably result in a massive panic.