Why is Princess Anne farther away in line to the throne than Prince Andrew's girls?

The succession to the United Kingdom follows the male primogeniture process. This process is: 1. Eldest son of the sovereign followed by his son or if no son then his eldest daughter and successively younger daughters 2. Second and successively younger sons of the sovereigns, their sons or daughters. 3. If no sons of the sovereign, then the sovereign's eldest daughter and her sons or daughters.