Here is what the article actually says:
"Palin has said she was baptized in the Roman Catholic [C]hurch. As a teenager, she began attending the Pentecostal Assemblies of God church in Wasilla and was baptized there by the founding pastor, Paul Riley."
There is no contradiction between this and what she told Time magazine in August, that she was baptized Catholic as a baby and her parents began going to Protestant churches.
There is no indication, so far, that Sarah Palin ever was a practicing Catholic.
Wouldn't a Catholic parish have records of her First Communion and Confirmation, as well as attendance at the parish school or CCD?