User blog comment:Martialmaniac/HxH timeline/@comment-30484460-20161214062633/@comment-5780397-20161214113139

We do have an official timeline, which simply could not have been retconned. Gon's age is the only element that contradicts it. The Hunter Exam is a yearly event. There have been 3, 3 years have passed. So long as a retcon is not confirmed, this is a plot hole, and in either case, displaying both versions is the right thing to do.