Savages drop question M3S specifically

[Mioooh]

So on Monday my savage team finally managed to get a kill on Brute Bomber we did however have one person who had cleared it and the notification said 7/8 eligible for loot.

When we killed him only 1 item was dropped which was coffer for the chest pieces. Is this normal loot drop behavior I thought we would be eligible for 2 as 5-7 eligible reduces it by only 2

If 5-7/8 are eligible it means you will be rewared with 1 chest. if its less than 5, you will get no chest, only the token.