Account status demoted and item bug disapearing. Icecrown realm

Hello, 1 week ago i was leading icc 25 and i was rolling the loot after LK, so people stay to the end, and dont need to replace someone every boss. On BPC when i loot the boss off hand it shows up for 1 sec in my bag then i saw the name "shadow silk spindle" in middle down of my screen and it disapear from bag, and ive open ticket instantly. The same bug i saw in Voa when mount drop disapear. But for 10 years of play in molten i never saw icc item disapearing like that. I didnt get much help from all the tickets ingame and i got banned 2 days later, then i apeal my ban with all the pictures i had with every one in raid and every item in bags and my ban was removed, but my account its still demoted to normal status, when i dont have any foulth of that issue.
Ive opened so many tickets to just tell me what coused that bug to avoid it in future, but didnt get reply, and im the guy who is always fallowing the rules, and i dont think thats fair to get demoted w/o doing anything wrong. Im leading raids every day, and from now if i dont stream on twitch i feel like im gonna get baned, and im laging bad.