@AxelFaiz haha no problem friend. I'd hazard a guess that most people don't even know that demographic =/= genre and just assume it's the same thing XD (So props to you for knowing the difference!)
Also funny tidbit, Seinen is actually the catchall for everything
not Shounen/Shoujo/Josei. The other 3 are much more specific demographics, whereas Seinen is kinda....anything else 8D
This is why a lot of cute-girls-doing-things manga and 4koma are Seinen titles, as well as many school age romances that aren't necessarily any more "adult" in content than any other shoujo or shounen title.