Has Mormon scripture or doctrine ever changed?
These headings are incorrect. They should read "Other Christians" and "Latter-Day Saints", since Latter-Day Saints are Christians no matter how many times others deny it.
The headings are fine as they are. Christians, by definition, are followers of the Christ of the New Testament, Jesus - the Son of God. Mormons have redefined the God and Christ of the Bible and follow a false god. By definition, Mormons are not Christians as defined in the Bible.
No, and the lies that you people tell about them have stayed pretty consistent as well.