I think I speak for all of us who have been working on the Baby Sussex Story when I say that mistakes happen to the best of us when we’re tired! pic.twitter.com/0pSqHJEdlt— Omid Scobie (@scobie) May 8, 2019
The Royal Family's website now states that Archie Harrison Mountbatten-Windsor is in fact "the first child of The Duke and Duchess of Sussex and is seventh in line to the throne. Archie weighed 7lb 3oz and The Duke of Sussex was present for the birth." Charles and Camilla still haven't seen Master Archie yet.
Royal Family Accidentally Introduce Archie on Their Website as Prince William & Kate Middleton's Son https://t.co/c90HgDXbnB— People (@people) May 9, 2019
Source 1 + 2 + 3