You're doing them on 360 or PS3?

On Ps3.

ok here's a question, what do the diagonal arrows mean before a punch or kick command? when holding a diagonal direction i don't notice any difference in moves so i'm curious. Also, is it just me or does the detection seem off? Cause i'll seem to do every move perfectly but it won't count it.

It means a jump attack. You have to jump forward in the air toward your opponent and hit the button or button sequence listed directly after it while still in the air.

Good luck.

Yeah, there is a problem with the computer recognizing if a combo landed.

Yeah, it means jump and attack at the same time. You need to perform the two attack i call at the same time. I don't get confuse with this but what is confusing me, is that when i chose DeathStroke. I see some weird sings that i have never seen them before.