Couple of iAntivirus questions

I just downloaded the iAntivirus app last night and ran it on 2 of my macs and I have a couple of "may be obvious" questions.

 

1) What is the default behavior if I get a report of "5 files with viruses found" (message approximate) and I don't do anything?

    Does the message imply the the viral files were cleaned/removed?

    I didn't realize clicking on the message would tell me more about the files, but I just want to make sure they had been "taken care of".

 

   A later scan of the entire system reported no found viruses so I assume they have been removed?

 

2) While the app is scanning I see a message like "1,599,591 files on sytem" and at the end of the scan I see "1463117 files found".  Is there a typical/standard explanation for the number discrepancy?