The answer to crack or not to crack-today's deck mystery

We got 2 emails commenting on the case of the cracked deck-kudo's to both respondors, they both said that the staple(s) were stapled over the seam, into 2 pieces of plywood, which when expansion/contraction occurs (as it normally does with any wood product), the staple is moving too, likely causing the deck to crack. Scroll down the page a bit to see the picture of the cracked deck.

Careful stapling would have avoided the seam being zippered together, preventing the cracking.