I checked out the advanced search described in the description and, yes, I see the same bug listed more than once.
(PS The use of the word 'duplicate' in the title can be a bit confusing - people using Launchpad usually think of "duplicate bugs" to mean two or more bugs with different bug numbers but describing the same problem. This is not what you mean here so I am going to change the title.)
I checked out the advanced search described in the description and, yes, I see the same bug listed more than once.
(PS The use of the word 'duplicate' in the title can be a bit confusing - people using Launchpad usually think of "duplicate bugs" to mean two or more bugs with different bug numbers but describing the same problem. This is not what you mean here so I am going to change the title.)