Automated drip campaign is not sending to the entire list

Hi. I have an automated drip campaign that is not sending to the entire list. There we 48 names on the list that triggered the email. The following series of emails were sent. 48, 42, 10, 9, 9, 9, 8, , 7, 5, 4. There are time delays between each email but there are no conditional splits. There were no unsubscribes or bounces. It's possible that I failed to activate the path for each email. I just activated the path for each email. If that was the cause of the problem, what are my options for sending the automated drip emails to those that did not receive them? Thank you.