Yes. (sometimes)

Your listing agent can set appointments on your listing to be exclusive or overlapping. 

An exclusive showing will only allow one buyer's agent and buyer in your home at a specified time, while overlapping them can let more than one agent in at a time. 

Overlapping showings (also known as double-booking), can be beneficial in getting more interest in your home. If you want to prevent or allow overlapping showings, you can contact your listing agent.