Probably the system has detected you guys as fraudulent accounts as cheating the referral system due to the fact that both of you share the same IP. If you guys do then that is indeed the problem. Or maybe you just made up the brother and me story so you can withdraw your winnings and referral commission, if so you should probably stop as it's illegal.
So-called brother and relative stories is the most common alibis for those people who do make abuse either on faucets or promotions.Its normal to think that having the same IP and having the same operation ( faucet claiming) can really be considered already as abuse.For sole intent on having referral earnings and now you are questioning why isnt counted or credited? Then you do know already the answer.