I am not sure if my computer is not working well but today I defeated a person who had alot more rank than I did. I waited till the end of the countdown screen so my rank was saved but I checked the top list and it didn't change a bit.

Another thing was that I was fighting someone and it seemed cleared enough that I was going to win, but none of my attacks did damage to him. (no he was not blocking)

Is there something screwed with my pc? do I have to change any of the net work options, etc?

Internet..lag its basically cause u ant playin in sync..read about it..... when u play people like italy...who lag out over 90 percent of specialas..which can mean like 8 - 20 specials...its really annoying.

go and check the top scores again, it should have been changed by now. they're not updated as soon as you win the match it's something like every 8 minutes that they get updated and even longer for the rank next to you're name in the chat room to be changed

ive had this same problem too but my rank changes about a day