I have a second story deck that i rebuilt approx 3 years ago.i replaced the 4x4 PT support posts and tied onto the rest of the deck. the posts set on top of a concrete pier and fastened with a metal cleat. they rise up through the deck, attach to the band and continue up to attach to my railing. it has been extremely dry here and the 4x4's are starting to twist and bow. they are sealed with deck stain. any ideas?