Remove duplicates in search results.

include/export/export.hpp

@@ -58,7 +58,7 @@ namespace Export
         ostream &_out;
 
         /*!
-         *  @brief  Sort entries from newest to oldest.
+         *  @brief  Sort entries from newest to oldest and remove duplicates.
          *
          *  @param  entries List of Database::entry to sort.
          *

src/lib/export/export.cpp

@@ -33,6 +33,8 @@ namespace Export
                      {
                          return (a.datetime > b.datetime);
                      });
+        entries.unique();
+
         return entries;
     }
 }