That 24 hours of drying time they tell you on the concrete bag is not just a friendly suggestion. I learned that basic physics will absolutely come for you if your concrete mix is still lazy and wet. The ground just swallows it whole and your post does its best Leaning Tower of Pisa impression. My neighbor's fence looked like a modern art sculpture for a week because the new mix refused to bond to the old slop.

Actually, from what I've seen, sometimes suppliers really do drop the ball without warning. Had a situation where a reliable vendor suddenly went out of business, leaving everyone scrambling. It's not always about backup plans, more about unpredictable stuff happening. Blaming others might be a reflex, but it can also be a legit reaction to bad faith actions.