I think you have done some changes with Potlatch. The Changes you did will only be compiled in the visible Map once a Week. But you can still checkout your changes by editing the Area again. Sometimes it takes some time to load all the tracks once you opened Potlatch. Just wait a little and your changes will apear in the Editor Window.

Don't worry that your work could be lost. If Potlatch is not able to Save something it will tell you that. And if you want to leave the Editor without saving your last changes it shows you a warning message too.