I just added the BoA accounts- given the absolutely more annoying than words can describe- change to the automatic upload.
Quicken does not offer me a choice to link the "new" account to the "old account". I did the poer steps in validating my account with BoA, it lists my checking account, I had the option to add new or link. When I tried to link, it did not offer me a choice of the old account.