[Fey]

well...and I just realized this RIGHT NOW, emma's age isn't as confusing as Scotts. After all, in origins we see Xavier standing, so he's not been shot yet, and emma's a teenager. This works fine. However, we see a teenager scott/cyclopse in the same movie...and he's NOT old enough by the next round of movies to account for that time lapse...nor is it ever explained how his younger brother is now so much older than him....
But I usually just call 'different universe' and it's all better in my brain cannon.