The list you got all look related to having a pressure leak in the fuel tank system, which is letting air in/out. A common reason for this is not putting on the gas cap tight enough, or a failed seal in the gas cap.
A good first place to start is checking/replacing the gas cap. Some shops may have a tool for testing gas caps.
If the car is driving fine, the main hazard with this issue is that some gas fumes could be escaping from the tank.