Сopying of the last sequence in an alignment copies all sequences

Scenario:

1. Open "COI.aln".
2. Select the "Hetrodes_pupus_EF540832" sequence (the last one).
3. Go to the "General" tab.
4. Click "Copy".
5. Click on the "Project view"and paste.
   Expected result: the selected sequence was inserted only.
   Actual result: all sequences were inserted.