Cmon guys some continuity errors are bound to happen. Even movies have plot holes and misscontinuities and they were written by one person.
It is a fact that if many people are describing something, they will describe it according to their pesronal angle of viewing, so there will be someoverlaping.
That all is only natural, but someone has to make sure that BIG errors don't happen. I guess this could be done by having some scenario control during the process of making a book/comic or a game or whatever..