[psylockolussus]

I think these continuity errors wouldn't happen so much if this was a TV series because the producers would have planned which characters will appear in the next 5 to 20 episodes, next season and they are gonna shoot the episodes in less than a year. Plus they have more time to develop the characters.

But with movies, its different. The gap between the X-Men movies was 3 years and in those 3 years, a lot of things changed (crew/cast/story). The audience wouldn't also notice the continuity errors that much (especially if the last movie was released 3 to 5 years ago) compare to watching a TV series (that is airing a new episode every week or everyday). I also don't think the producers really care about continuity problems that much. I feel like they just pick which characters that they want to use and they have limited time to explain/show things in a movie so sometimes they just ignore the continuity errors and just move on to a new concept/story.