You can see video what was the reason of ban.
1) Char
Jorginha never did random move, never tried to walk "near" iBloodSeeker ( he is always running with 1 click towards the back of iBloodSeeker, not to his right or left or just close - always exactly towards this char ), but player saying that he wasn't following or using macro to follow. So it's actually clicks ( example: at 0:48 he is 100% trying to follow char and not just randomly clicking, or 2:40, when SE running towards iBloodSeeker, then switching to mob, you can't say "He is just running near me", 3:36 again ).
2) Char changing target and casting Stigma only after iBloodSeeker changing target. Few players was saying that SE can't use skill before mob is attacked, but in video, there are mob under attack, but SE waiting for iBloodSeeker kill previous mob, example: 0:38. 2nd mob was under attack by dwarf, but because iBloodSeeker was still killing previous mob - SE wasn't trying to cast Stigma on 2nd mob.
0:55, char trying to land Stigma on mob that out of range, then ( again as person said ) without macro he is switching to another mob that behind him.
3) Jorginha know that stigma landed even in middle of teleportation:
0:09 - char casting stigma while been teleported, so his screen in time of stigma landing is black, he didn't knew that skill is casted or not, in this case normal person have to recast it again, to be sure, but not Jorginha. I had to slow video to 0.25 speed to see if skill actually landed or not.
#1 person answered that he said his brother to always be near him, but we can't actually see it on a video. He is always running towards iBloodSeeker, not trying to be "near him".