During scheduling, it's important to make sure that people are assigned to correct times.
Check out this clip from Planning Center University.
The times that a person is scheduled will show up on their:
Schedule in Services
Click a person's name in a plan to view the Editing Scheduled Person modal. Make sure that the correct times are assigned to the person before scheduling them.
Each team is assigned to specific times; however, you can change those times for specific people. Make sure that the times checked are the times that this person should serve. To update the default times assigned to each team, edit each time.
If the team member is on a Split Team, schedule them to only the times that they are supposed to serve.
Click Save to save the settings.