Why Is the Number of Times of Cleaning Different from the Number of Attacks for the Same Public IP Address?

Cleaning is triggered automatically when an attack is detected on a public IP address. The cleaning lasts for a while. (Only attack traffic is cleaned, and users' services will not be affected.) If, during the cleaning, another attack is detected on the same public IP address, the attack will be cleaned together with the previous attack. Consequently, the number of attacks increases by one while the number of times of cleaning does not.