Whenever you queue into savage as a full party, only the party leader has to have the next floor unlocked. For example, party leader is ready to enter e4s, party fills. You have not cleared e1s,but for whatever reason you join an e4s 2 chest. Party queues, and you enter, you have now just forfeited all loot to e1s, e2s, and e3s, just by entering e4s, whether you clear it or not. Make sure that you have cleared past floors if you want to help someone on later floors, that is if you still want the loot. Savage has worked like this for a long time.