Old activities are showing up in my annual report that shouldn't be there. Why is that and how do I fix that?

Most likely this is occurring because the activities are missing date information. In order to correct this issue you will need to go to the screen for that activity type and ensure there are no records that are missing dates. To do this, go to the main menu, click on the link for the screen you want, and then look at the summary screen for records that do not show dates. You can click on those records to open them up and update the date information. Once all of your records have dates, you can run your report again and those old activities will no longer be listed.