If an item sells at 9am on Friday, then the post by date is going to be a few days later due to the weekend.
I have a 5 day handling time, but still post same or next day. The results of that are, buyers are over the moon when their item arrived before the first estimated date. I've never had a postage defect.
I would be changing your handling time. You don't have a premium badge, so you don't stand to lose anything. I looked at a few of your items and they said delivery guaranteed by Oct 19. Fat chance of that happening! Only way that would happen is if it was sent express (which wasn't an option under the postage tab).
