Do the vampires in twilight have reflections?

Yes. the vampires in twilight do have reflections. it is just a myth that they dont, humans just made the myth up so they would think they would stand a chance at defeating a vampire. Some vampires have had trouble in accepting the fact of their new existence and couldn't bear to see their reflections: a reminder of who they were and what they have become. Other vampires have suffered great denial, refusing to see the fact of their reflection. From instances such as this has evolved the myth of a vampire not having a reflection.