I participated in a conference for which I wrote a conference paper (published in the proceedings), made a presentation and presented a poster (both unpublished). All three items present the same work and therefore have the same title. Although I have assigned them to "conference paper", "presentation" with type "presentation" and "presentation" with type "poster" respectively, they appear as duplicates.
What is the best way to deal with this problem? Should I ignore it? Should I add "(presentation)" and "(poster)" to the end of the last two titles?