Am I mistaken?

Rating: 7/10 (18 December 2005)

This (2005) is only the second time I have seen this film since it was released. It holds up really well but today's viewer must realize that this was made before "reality TV". The perception at the time of the making of this film (1998) is that people would hate to have cameras record their every waking and sleeping moment. How wrong that has turned out to be.
Now my question is: why isn't Ed Harris' name in the credits? He played Christof and even won a supporting best actor award at the Academy of Science Fiction yet his name is missing from the credits.
One casting question: why did they choose three actresses to play his love interest who all had the same blonde streaked hair style?