You will need to sync the sheet to match the current group registration.

Please be sure that the sheet is on.  Click on the 3 dots.

1. Choose "Sync Members".

2. Select the groups to sync. Please note that you can select the entire organization to sync all groups at once.

3. Check your sheet again. This syncs what is currently on your dashboard with the sheet. This is not done automatically, so remember to sync your sheets regularly.