If They Were To Remake This...

HI, True-to-your-heart
First a quick warning to be careful about listening to guides. They're wonderful people and indispensable at historical sites, but usually volunteers and not bona-fide historians.
That said, here, in edited form is a quick rundown of the pros and cons of Anne’s birthdates:
“Until recently, it was accepted that that Anne Boleyn was born in 1507; this was the date noted by William Camden in the margin of his manuscript copy of his biography of Elizabeth I, printed in 1615; another late source, Henry Clifford’s Life of Jane Dormer, Duchess of Feria, based on the reminiscences of one of Mary Tudor’s maids of honor as told to her secretary in old age, published in1645 also gives Anne’s date of birth as 1507, stating that ‘she was not 29 years of age when she was executed’. However, if Anne was born in 1507, she could not have been more than six years of age when she entered the services of Margaret of Austria in 1513, and impossibly early age. For a more realistic date we must turn to Lord Herbert of Churbury’s biography of Henry VIII, written during the early seventeenth century and based on many contemporary sources now lost to us. Herbert states that Anne was twenty when she returned from France in 1522; this would place her date of birth in 1501-02, and make her around eleven or twelve when she entered the Archduchess’s household. Two other late sources support an even earlier date of birth: Gregorio Leti’s suppressed life of Elizabeth I, which suggests a date of 1499-1500, and William Rastell’s biography of Sir Thomas More, both written in the late sixteenth century.” Alison Weir, The Six Wives of Henry VIII,. London 1991.
“There is considerable uncertainty about the date of Anne’s birth, some authorities giving it as 1507, but there is a far greater probability in the statement which makes it 1501, the year in which Catherine [of Aragon] came to England.” Sarah Tytler, Tudor Queens and Princesses, London 1903, reprint 1993.
“Anne Boleyn's birth date is unknown; even the year is widely debated. General opinion now favors 1501 or 1502, though some historians persuasively argue for 1507. She was probably born at Blickling Hall in Norfolk.”
This last brings us to the other point: If Anne were born before 1507, she would have been born at Bickling Hall in Norfolk, not Hever Castle. “...prior to Sir William [Boleyn’s] death in 1505... Thomas Boleyn and his family lived at the manor house at Bickling in Norfolk. Anne’s chaplain, Mathew Parker, confirmed her birth here in later years…” Weir, op. cit.
Retha M. Warnicke, The Rise and Fall of Anne Boleyn, Cambridge 1989, supports the 1507 date. But Eric W. Ives, The Life and Death of Anne Boleyn, U.K. 2004, gives the 1501 hypothesis. And Ives is currently being hailed as the definitive biography.
I think 1509 can be definitely dismissed as a possibility. A child of barely three years old would have been highly unlikely indeed to be taken on as a maid of honor to Mary Tudor, Queen of France, as Anne was in 1512.