Yeah... in a way, that doesn't bother me because we make up our own stuff and mix and match different canons here and there anyway, ESPECIALLY with DC chronology, because it's so all over the place. But it does cheapen it a bit when the writers don't really bother to keep notes on little facts like Lex's health or how old Chloe was when her mum left, etc. The more mistakes the canon writers make, the more right the fans have to rewrite everything ;) But well-thought out canons are too rare considering how high-profile it's all supposed to be.