Only receiving email notifications sporadically for members daily reports

hi,

so it seems very arbitrary which reports i receive from the members i support. when i first start supporting someone on calorie camp i will receive email alerts that that person has submitted a daily report but after a few days they stop. there are maybe 3 people that i get alerts for regularly and the others have just disappeared - and i checked, they are still submitting daily reports and i am still on their supporters list. there are a few cc'ers reports i would particularly like to follow but the only way i can access their daily reports is search my emails for the last notification i received then forward through all the days to the present. any help? and all my boxes are ticked on my settings page. and i use yahoo mail if that helps.