From what I’ve found through searches premiums listed are where it was a direct premium by individuals, certain organizations such as retirement groups to BCBS. ASO is administrative service(never really found what the O is) are more for self funded such as companies that fund the plan and BCBS just administers and pays claims out of the funds the company sets up. There maybe other types in each of these categories, but those are the details I remember. Also, the % money allocated to each group is different it isn’t the total $/total claims. ASO had fewer dates covered and you can receive a settlement if you have money in either category. Also, any claims less than $5 will not be paid. I think the amount in the columns is not how much you are getting, but what your claim is based on. After that I don’t know much more.