Unfixable Cupid's Courier - Bowman

Description of the bug: (optional screenshot/video): Once you have completed the quest it will appear back in Avaible Quest, then when you start it again and that your trying to finish it, it wont allow you to, its also telling you the day you completed it before which obviously mean it should be in completed quest.
What is supposed to happen?: It should not be repeatable and remain in the completed Quest List once it been completed once.
Where did you find and/or notice this bug?: Amoria, Angelique NPC
A step-by-step guide to re-producing this bug (optional): -
Extra information (optional): http://imgur.com/a/JHpsq