We have made a change to the way your Activity Logs display. To improve the load time of the page, by default your Activity Logs will only display your activity for the last 30 days.
You can still view and export all previous activity on your account by using the Show older logs option.
To learn more about the new changes to the Activity Logs page, and how to view an activity log that is more than 30 days old, please see Activity Logs