To sync your information with our servers please press the 'Sync now' at the top of the menu. In such case that your Mac app is showing different information than your mobile app, tasks from your mobile may be lost - please make sure to write them down. Log out and back into the app on both your mobile app and the Mac app. At this point you should be seeing the same tasks across all platforms. Manually enter any unsynced tasks if you have such. It is important to sync your account as often as possible so your information on our servers is up to date.