Which is, as far as I'm concerned, a lame and inadequate excuse...just as DYRL being "a movie within a movie" fails to convince me.
My feeling is that these are stopgap answers to throw at overzealous continuity hounds...I much prefer just ignoring the discrepancies completely and not trying to figure out "what actually happened." As long as there are no major retcons (like, for example, saying that Focker actually survived Space War I, or that Isamu was actually test-piloting the YF-24 in Plus), I'm content.