It is not possible to update an account template within the IDM user console. When trying to modify attributes in the template there is a no such attributes error. This error is visible in the server log. However, it is possible to modify the template via the provisioning manager with no issue.
Error code: Error: [LDAP: error code 16 - No Such Attribute]
When you run an etautil command it works directly with the provisioning server but does not notify Identity Manager's web UI. This is why the data is missing from your runtime database and why you cannot modify the templates correctly in the web UI, and only in provisioning manager.
Since the templates have already been created you will have to modify them in provisioning manager, but for the future please do not use etautil commands for anything you'd like to interact with using the IM web UI.