I have been tracking how scores are added in the Workflow on

Contacts > an individual's contact page > Contact View > Contact Timeline

It has explicitly stated that the Contact Score has been set to zero, so all previous scores accumulated prior to this setting should not be included

And since then only 20 scores are added to the contact

However, the contact score is 60

This happens to other contacts that I have in the same workflow too, can anyone please explain how the scoring works on Campaigns please. Thanks.