Of course either account is silly. Christine O'Donnell nonetheless likely remembered that she said those things on Bill Maher's "Politically Incorrect" TV show back in 1999. Given that Maher is going to "release a clip a week" until O'Donnell agrees to do his show, there's no telling what other skeletons she has in her closet.
Having someone pray for "protection" from witchcraft is also equally nutty. However, this hasn't really impacted her political career.
A video of Christine O'Donnell's witchcraft admission is here. A video of Sarah Palin's witchcraft scandal is below.