xKhaoTikx I'll check out this video and give you some pointers and also I plan on writing an in depth Sektor-Kitana MU analysis so I'll link you to that if you're interested once I'm finished later on....
EDIT: Just watched the matches. You seem well versed in this MU so not too much to tell you in terms of where to improve. Just a few pointers though...
1. Poke out of the U3 stance. You let Sektor get away with too many 50/50 mix-ups in open space for no reason. You have a lengthy D1 so once you see him doing this fancy shit then poke him out of it. The only time he should be able to enforce this mix-up is off frame advantage or maybe catching you off guard once or twice. You let him do it too many times.
2. If you see Sektor linking in missiles off his strings to catch you out, always jump backwards. Chances are he's putting an above up missile or in front up missile, either to keep you in place (above up missile) and sustain pressure or to catch the forward jump. I thought you dealt with that aspect well but jumping backwards is more often than not the most safe way to escape that shit. Or you can risk it and if you think he's going for an in front up missile, blow him up with 21 into full combo or whatever.
3. Deal with flame burners ruthlessly. Every blocked flame burner, even at farther (unpunishable) ranges should still let you get in his face with a F21 or even a 212, 21-cutter etc. Sometimes you respected one on block too much. You either backed away a little or you threw out a short range poke. Just get in his face or if you can punish it, do so. I thought you did better with the flame burners that hit you lol.
Anyways it really isn't much I'm just nit-picking here. The main thing to focus on is the first point I made, don't let him throw out random 50/50's everywhere unless he has a right to do so.
Hope this helps.