Audit Universe - Difference between Document Refresh & Read Document

Hi,

I have created reports to track the User Activity on different Universe and I am using Action Name filter with Read Document & Document Refresh.

I am always getting Read Document counts less than Document Refresh count. I am a bit confused because I expected a document to be read when someone clicks on report name and if they hit the refresh button it should get recorded in Document Refresh Action. So always Read Document should be more than document Refresh as one needs to open a report before they can refresh it.

Please explain the difference between Action Name=Read Document & Document Refresh.

Kind Regards,

Zahra