update count of sign_ups to NOT include those who have been deleted
update count of sign_ups to NOT include those who have been deleted

rdunlop/unicycling-registration,scotthue/unicycling-registration,rdunlop/unicycling-registration,scotthue/unicycling-registration,scotthue/unicycling-registration,rdunlop/unicycling-registration,rdunlop/unicycling-registration