Does anyone else have issues with Amazon Prime delivery times?

I've had a few occasions (and online chats over them with Amazon) where I have ordered and item it states it will be delivered next day, only to find that as soon as it's ordered the delivery time jumps on by a couple of days. The latest being the "only on vinyl" LP by Seasick Steve which I pre-ordered from Amazon on 17 June and was eagerly expecting it yesterday 23 Sept (its release date) only to be told it will arrive on 27th! And looking at the live listing for the item on Amazon it says that if I ordered a copy today I would receive it tomorrow.