When I visited the US there was a fitted sheet on the mattress, then another sheet, the blanket and another sheet on top. So the blanket was “sandwiched” in between two sheets. In Europe we have blanket covers which are closed from every side except from one side where you put it in. That prevents it from moving around. The American bedding was annoying at first and I felt not as hygienic because the blanket will inevitably touch you. But it’s also good because if you’re too hot you can easily remove the blanket and just cover yourself with one sheet.
Is that common or do you have different ways of making the bed?
Edit: Thanks to everyone who responded. Yes it was in hotels, I get now that a top sheet on top of the blanket is not common. That setup actually makes much more sense for a home and it is similar to the setup used in hospitals in the UK (although everyone else uses duvet covers in the UK).