Comment 1 for bug 894807

Thanks for the report. This appears to be an intentional difference in behavior. There are two related bits of information associated with an instance, a "hostname" and "display name". What you get back from "nova list" is the display name. What you see from nova-manage is the hostname, which is a somewhat sanitized version of the display name.

It's fairly simple to adjust nova-manage to use the display name (patch attached). However, according to comments in review 3523 (https://review.openstack.org/#change,3523), nova-manage is going away, so it seems fruitless to make the change.

Hopefully this explanation at least makes it more clear why the results differ.