i login my mule and collect the mail on item and sold and my total gold is 1300+
.then i logout to my main acc to play. then i login my mule again to check, my gold become 1100+. and i dont know wtf happened, and i didnt logout my main in between.

pm a GM if you really sure that you didnt make any mistake like the items havent sell or stuff like that
but i dont know whether GM will help or not but its never hurt to try

by the way how does the referal program worked?
i refered my cousin to this game and he paid the char with a credit card already and is level 26 now.
My game time ends today, so do i get a 30 day free from referring him?

Wow, what a drastic change of topic lol.

But yeah, once your cousin upgraded his account to a full retail version you automatically get the free 30 days.

i thought i lost 100g and put in a GM ticket. then i remembered i sent it to an alt so quickly canceled a ticket before i look even more foolish.

LOL yea drastic change of topic!
Yes, once he upgraded his account you get free 30 days, but this might take some time. It really depends. I had 2 referrals who upgraded to full. I got the free 30 days from the 1st referral within a few days of him upgrading while I got the free 30 days from the 2nd referral after almost a month of him upgrading. So it's not a guarantee instant.

my cousin upgraded from the 10 days trial account to paid account.
But he doesnt upgrade to the burning crusade, just the normal azeroth one and has been a week since he upgraded.
Im not getting the 30 days yet, or need to upgrade to BC then only can get?

No need to upgrade to BC. Like I said, I waited for almost a month. Just check the status, if it says he has upgraded, just wait until u get the "present" icon

need wait till the logo turned green?
its still in the 3rd yellow stage,

Yep, need to wait before u get ur 30 days

any use for me to send mail to billing@blizzard.com to make the process faster?
Cannot wait 1 month, too long, must play

actually its once the friend whom u sent the referral to has made his FIRST RECHARGE, baru then u get your 30 days free. I got 60 days free so far

sry bout d caps there, just to emphasis.