Hello @gregober,
Hope you are doing good,
Indeed, “Upon import only the old revoked key in DSA appears on the GUI.” is a bug from the application, you might want to open a bug on github and this will be taken care of in the future.
Passbolt isn’t shipped with a feature to manage the keys of a given user, if still you want to do a key rotation, you might want to check the workaround mentioned in this topic : As a logged in user I should be able to change my private/public key.
Cheers,
Gérold.