Often a situation where things don't go just as we expect causes us to create constructions in our heads that make life stressful. I work with deadlines, clients, details all the time in my work. Often things don't go as anticipated or hoped for.
My usual response is to smile, understand, and know that it is what it is. All the fretting, worrying, anger, etc. in the world will not change it. The only thing that I have control over is how I react to it. While on the one hand, it is regrettable that the OP received his WS 24 hours late, and whatever implications negative or otherwise that may have had for him; on the other hand I am happy Paul is so dang busy he is having a hard time keeping up.
So, I would encourage us all to make choices about these things that provide happiness in our own lives and goodwill in the forum. To do otherwise, seems at least from my perspective, destructive to all concerned, makes little difference in outcomes, and creates a lot of stress and discord.
I have told my kids numerous times that we have two choices in life, we can be the pigeon or the statue. It is often how we perceive the events in our lives that makes them what they are and what we are. Cognitive restructuring works. We do it all the time. Sometimes we just have to be deliberate and not go with the first reaction that comes to us. A little thought and reflection can remake a negative into something that serves us well. A little pause and reflection, asking "Where is the gift in this?" can go a long, long, way. I'm guessing the OP could really, really appreciate getting those WS because of the delay. Absence does create fondness, if we choose it.