The GREEN number in the Monitoring stats measures the number of MAIN RECIPIENTS only (so, the row with the email).
The MAIN RECIPIENTS are used for the stamps calculation when you send.
The price of a send out depends on the number of MAIN RECIPIENTS and the cost per sending.
The GREEN number at the bottom of the recipient list adds up the "guest number" for all MAIN RECIPIENTS, so e.g. a 4 for a family (in comparison - the Monitoring GREEN calculates only 1) and the accompany rows with the number 1.