You should stop reading mock drafts and assume you're a draft expert. Also, reading Clayton's or Kiper's columns also won't help you. Was any of them at the war rooms to know how the draft board was ordered?
Do you know there're 'backups' and in a football team? How about 'special team'?
Again, how do you know Whitner and McCargo would be available in several picks laters? Because Clayton, Kiper, or the so-called "experts" said so?
Were they at the war rooms of the teams picked after Bills so they're sure Whitner and McCargo would be still on board?
No, they were not, just like all the fans.