I have had this issue for some time. When I open Quicken, it will create new accounts based on my old accounts. I will include a picture. I actually cleaned it up a while back, and if you will notice in the attachment, there are 4 accounts that are associated with Discover 08xx. After I cleaned it up, there was only the one with a balance of $643. There are now three additional accounts with a $ 0 balance. They are created, but no transactions are ever added. I actually spoke to support, and he had me do some things (I don't remember what), then delete the duplicate accounts. Then, after using Quicken a few times, they are created again. This is only an image of a small part of the accounts screen on the left pane. Has anyone had this happen, or have any idea why it is doing it?
[Edited - Readability/Removed partial account numbers]