The dreaded EDDs.

I only post on a Monday and Thursday afternoon due to home and work commitments.

I have 3 day dispatch set up, only use RM 2nd class delivery, which is dropped at the post office in my home town of Broadstairs in Kent.

Can somebody please explain how I can stop getting buyers sending me messages as their item has not arrived on the Tuesday ( for Monday post)  and Friday ( for Thursday post) as that is when Ebay are telling them it should arrive please?

I have attached my EDDs for the items scheduled and sent out this Monday, and it makes no difference when they purchased, or how far away they are - the dates appear to be random. They all go in the same bags.