Boxing not Bunching pg. 65 Champ Omaha

[Beavis68]

Ok, sorry for the annoying double post, but I want to get the right answer on this.

The last paragraph on PG 65 of Championship Omaha.

"It doesn't matter how many times the cards are shuffled, they get boxed so that certain cards come out more often than other cards. In low-limit games, people who are playing a bunch of strange hands sometimes hit a lot of them because of this "boxing" effect."

I ask again WTF????