Where the F%$K is the Dish Soap?

We bought a GIANT container of dish soap from Costco. It must weigh 50 lbs. We use it to refill the normal sized container of dish soap that sits on the sink in the kitchen. One day several weeks ago I couldn't find the normal-sized bottle. So, I reached under the sink, heaved out the giant container, and used a tiny amount for dishwater. The next day, same problem, same solution. The third day I was tired of heaving that stupid giant container around so I went to Target and bought another normal-sized bottle. The NEXT day the old normal-sized bottle was back on the sink right next to the new bottle. WTF?????!!!!!!

Crazy life got in the way. I meant to ask Mark about the disappearing and reappearing dish soap, but I didn't. Then...

Last night in the car:

Me: "Oh, and we're almost out of dish-washing stuff."

Mark: "Oh, I don't think so."

Mark: "Wait, do you mean DISHWASHER fluid?"

Me: "Yeah. I know we have dish soap. But the dishwasher soap is gone."

Me: "I had to buy another dish soap when the other one disappeared."

Mark: "I know."

Me: "Yeah, where was the other one anyway?"

Mark: "On the deck stairs."

Me: "OH. OF COURSE. Duh. I can't imagine why I didn't look there. Stupid of me."

Mark: "Yeah, stupid." I look at him. "What? I'm just agreeing with you. Isn't that what I'm supposed to do?"