You can wrestle with semantics, or you can take the whole context into consideration. The word "stay" is but a singular token. It's like, suppose you're looking at different objects, both have a -40° written on them, but one says "-40° C" and the other says "-40° F", then you say these two objects have absolutely nothing in common, are totally different. Yet they're both thermometers. They're both measuring the same thing. That's kind of what is happening in these two messages.