Sorry to bump in, but do you have any info about the sealed/draft bug that came with the last update? Just wondering if it's even worth holding onto the bugged drafts and if they can even be fixed.
Sorry you got hit this bug.
Unfortunately, the fix to the best of my understanding will probably not allow you to edit limited decks in events already in this state, just prevent new ones from getting into it.
I would contact Customer Service about your in progress event.