WIX Filters Deal

Am I missing a step here? I followed the steps and came up with $9.09 each for a 57620XP oil filter (for my 5.9 diesel). I then checked Rock Auto and they charge $7.40.
For the same 50.00 order at Rock Auto you can buy 7 @$51.80 plus shipping of $8.87 for a total of $60.67. That is $8.66 each?