Odd. I saw both ASYLUM and AND NOW THE SCREAMING STARTS in HD on the MONSTERS-HD channel a while back so I know that they have widescreen HD masters. Amazon has been known to make mistakes.
Oh yeah! Amicus horror flicks are my favorite. I know I'm in the minority, but I always preferred them to most of the Hammer output. ASYLUM and DR. TERROR'S HOUSE OF HORRORS are also great fun.