I try to document the life of the primary family members, chronologically, using all available source documentation. If other researchers or published sources were used, I list those as well. I still have a long way to go before I get all of my pages to this level. It was probably an oversight on my part for not including it. I'm sure that I have errors throughout my data.
Omissions are the most likely error.
It is impossible not to have errors. If you have proof for something that contradicts what I have, feel free to share it. If I feel that I'm right, I'll be glad to explain why. If we both feel we are right, but not in agreement, I'll be glad to mention the difference in the commentary section. I don't mind showing alternate views, even if they seriously contradict my own particular belief about a family.