One thing I heard about staining decks if they are in direct sun light, not under a roof. After staining, rigup some type of tarp covering the deck from the sun light. Tarp can't touch deck to allow solvents to flash off, but tarp slow down time it takes to flash off. How to keep tarp off the deck is the tricky part.
On another similar subject. Had trouble painting a wall after wall paper was removed and the glue removed with proper cleaners. Painter told me to paint with Kilz, etc, but wait a full week to top coat. But I said "can says ok to top coat in 3 or 4 hours". (Been a while so number might be off) So I waited full week and repainted. Stayed on afterwards, not like first time that peeling/bubbles appeared the next day. The week time period allowed the solvents to flash off and the Kilz to cure. Same with decks and covering from sun?????? I have not tried the deck tarp yet. Jon