The actions that you took were steps for you to leave the “Finance” organization (i.e., cancel your organization membership), leaving behind the other users of that organization (if any), or leaving behind an organization with no members. Each organization must have at least one admin/owner, and as you are the only admin/owner of the “Finance” organization, you cannot leave the organization until another organization member has been designated to take over your role as admin/owner. However, did you really want the “Finance” organization to continue to exist without you as a member?
If your goal is actually to delete the organization, then follow these instructions: in the Web Vault, click Admin Console in the lower left corner, then go to Settings > Organization info in the left-hand navigation menu; scroll down to the “Danger Zone” section, and click the Delete Organization button.
IMPORTANT: This will permanently and irrevocably delete any login credentials or other vault items that were stored within the “Finance” vault (including its unassigned items, and all items assigned to its “Default Collection” or to any collection that you may have created).
P.S. Why do you want to leave/delete the organization, anyway? It seems that your original goals could be achieved simply by renaming the “Finance” organization (to “My Organization” or some such).