So, I was making a map. It was going fine, no errors to account for. But later, something happens. I get a leak from a water tower prop. I move it about, and it doesn't fix it. Eventually, I get tired of it, and delete the prop. That was the only leak. And then, suddenly, another prop is said to be leaked. This prop had literally never been a problem up into this point. So, why is this? Someone tell me, please.