When i put a raid leaders name on a ban list on my oq on my computer and i write the reason i put it there. Why is it removed from my list?

what is removed? leader id, ban, or reason

when you ban someone, he gets removed from friend list for you to never see him again (tho you still have a chance to meet banned person in other ppls groups)

What i mean about removed is that his name and my explanation disappeared off my computer as though someone removed him from the ban list that i created. That is what i meant. When it happened i do remember in one raid i was in someone saying to raid leader " i saw your name on the ban list but don't worry i took it off". So I am asking do you have a master control to keep or remove raid leaders from ban lists....and if so why would someone bother to do that ? Obviously there was a valid reason the person put him there in the first place.

no master there, its stored in your setting locally. and only you should be able to remve it.
maby you have deleted some oq files recently or completely reinstalled oq?
ps. also i have no idea what happens if a person on ban list changes his battletag.