Why does Kent Hovind make so many mistakes?

In his seminar about the age of the Earth he shows an article about the nebula theory and tells us it's about the Big Bang, he says that Sirius was a red star 2,000 years ago now it's a white dwarf when Sirius is a white star binary and only a few 2,000 years ago said it was a white star, he says that stars on the outside of our Galaxy orbit the center faster than those on the inside when in fact it's the other way around, and claims that evolutionists believe that a dog can give birth to a non-dog when this is not evolution. I myself am a Progressive Creationist and don't believe in Evolution, but i think that Kent Hovind should understand Evolution a bit more before trying to refute it, and I also can't understand why some people like venomfangx can take him seriously