the person usually in charge or accepting/declining them is currently away and I (as replacement) only got the privileges yesterday. since i saw two registrations from you, i didn't know which one the real one was and declined both. you can just sign up again (once) and if everything's ok, you'll be accepted
Can that be because my bro is also playing SWC and both computers are connected to router from one internet provider? If so,how can I register not as multi (this case is not considered a multi I guess,in rules section registration of multi is required while using the same PC)
that case actually is considered a multi-account, since you're both sharing one internet connection in the house. can you please wait till next week (monday or tuesday), then send a mail describing your problem to firstname.lastname@example.org, she's in charge of handling multi-accounts.