Forum:KB:Numerous inconsistencies with the Solo family ?

Kind greetings to everyone. I've been kind of heavily into the Star Wars universe a few years back, and now that I've watched the new movie, I am noticing a bunch of contradictions. I hope someone could provide an answer. On one hand though, the movie sucked so bad, I'm not even surprised about the mistakes. Anyways. At first I was terribly confused about this "Kylo Ren". Am I correct in thinking this Ben Solo was created only for the purpose of the movie? I was at first confusing him with Ben Skywalker, son of Mara Jade and Luke. I mean, couldn't they name him something else, less confusing ? So, is he invented, "un-canon" sibling to Jacen, Jaina and Anakin Solo ? Another thing is Chewbacca's death. It states on wookieepedia he died on Sernpidal in ~25 ABY. How come he lives in the new movie ? Hopefully I am not babbling. Thanks.