Clear up your zombie sequel confusion!
If you want more info on the zombie series and all the sequel confusion, please check out this link:
http://www.amazon.com/exec/obidos/tg/guides/guide-display/-/1GMGARQDMBNIN/ref=cm_bg_dp_l_3/103-5988897-7343063
Copy and paste it into your address bar. This page gives amazing info on alternate titles and what films are considered sequels in various countries.