I’m not completely clear on what has happened so I will explain how the BSQ wallet works.
It’s using the same seed as the bitcoin wallet in Bisq but using a different derivation path. This means that you will get a new BSQ wallet if you move to a new Bisq directory and don’t use the seed from the old one. If that is intended the BSQ from the old wallet can be sent to the new one under the DAO tab. To keep the old BSQ wallet it has to be recovered using the seed from the original directory.
The BSQ address that’s displayed as a receiving address for the BSQ wallet is always an unused address. If coins have been sent to that address, a new one will be shown next time the tab is opened.
Altcoin accounts are only set up as information about the altcoin wallet. BSQ is also considered an altcoin in this case and the BSQ wallet needs to be managed as any other altcoin. This could perhaps be improved by autogenerating a BSQ altcoin account corresponding to the current BSQ wallet. It’s not possible to recover the BSQ wallet from the account information.