I have to agree that this rarely happens.
I always prefer to list my items manually one at a time so that I can leave a space of about 2 minutes between each listing which encourages multiple purchases.
I was still unable to post my listings at 8pm PST last evening and it was too late for listings to end....so...
I cancelled everything that was sitting in my 'Scheduled' file and I have changed them all to 5 day auctions and I am re-listing them tomorrow so that they will still end on Sunday.
Maybe this idea will help anyone who still has listings that they wanted to end on Sunday evening.