Clean and clean by deletion

Hi Symantec support

We test with EICAR.com event
In Anto-Protect policy, we select first action is Clean risk, and second action is Leave alone.
In the risk log, we found the Action is Cleaned by deletion and Status is deleted and current location is deleted.
May we know why the result is cleaned by deletion instead of clean ?
Refer to KB to  http://www.symantec.com/business/support/index?page=content&id=TECH102052
For example, this action is generally needed for Trojan horse programs. 

In our case, it is not Trojan horse programs.

On File sharing server, do you recomment to select action as "Leave alone" only if Clean action will delete file in some cases.