Hello, on the expert server I can see some people flying at incorrect altitudes. This topic may get shut down but I hope some people can view it as an reminder.
When you are going at a Westernly heading you go at even altitudes (Ex: FL280, FL300, FL320, etc.)
When you are going at an Easterly heading you will go at odd altitudes (Ex: FL270, FL290, FL310, etc.)
I Just wanted to say this to avoid mid-air collisions and to promote realism.
Stay safe and wash your hands!