Ok, I just studied the 'Mileage Overview' page some more and found another bug, which could lead someone to believe that the elite bonus miles are status miles.

Under the 'Accumulated Mileage Details' section, they list the following categories:
Asiana Airline Domestic
Asiana International
Star Alliance Airline
Other Alliance Partner
Partner and Event Mileage
Total Accumulated Mileage

The first four items are grouped as 'Airlines mileage' and total up to your status miles. However, that plus the next item don't add up to the total. They're missing an item for your elite bonus miles (which are itemized as 'BNS' items on your 'Detail Mileage' page.

Anyways, just another in a long list of bugs with their website, at least with the English version. I'd say they need to totally redo the entire English website. It must really be confusing to a newbie who isn't already familiar with OZ and the way things work.