The Club Registration and Reporting system has been upgraded to allow club admins to delete unwanted individual level records.  Just click the Delete link on the records you want and they will be removed instantly.  You can delete individual records using any of the Cart, Individual, and Remittance report screens as it's all the same effect on your centralized data storage.  There is currently no un-delete feature, but this will be added in the future as your records haven't been removed entirely and are just stored with a user-delete flag so that you don't see them in any of your reports and they don't affect your registration/element counts and totals.