When will we ever just accept that production companies sometimes mess up?
Oh the stories I could tell of screw-ups in productions I've worked on! It just happens. We're just human beings after all.
What never ceases to amaze me, though, is how we fans try to rationalize production mistakes as being intentional and completely explainable as reasonable parts of the show. (Star Trek fans are notorious for this kind of behavior!) A mistake is just a mistake, laugh at it, shake your head, and let it go.