Double information message when completing "Seeing the Seers"

[Umo]

Platform: Windows 7 Ultimate
ISP: Telefonica
Type of Internet Connection: ADSL
Internet Connection Speed: 10Mbps
Date & Time: Apr. 18, 2011 22:58 GMT+2
Frequency: Once (Did not reproduce)
Character Name: Umo Heima
Race: Hyur M
World: Gysahl
Class/Skill Rank: Thaumaturge/50
Physical Level: 50
Area and Coordinates: Gridania Aetheryte Plaza (4, 4)
Party or Solo: Solo
NPC Name: Sybell
Monster Name: None
In-Game Time: 6:38
Steps:
1. Talk to NPC Sybell for "Seeing the Seers" sidequest
2. Complete the sidequest and get the message 'You have heard words of the Seedseers. (5 of 5)'
3. '"Seeing the Seers" objectives complete!' message follows.
4. Get '"Seeing the Seers" has been updated in your journal' for two times.

Here's a link to the screenshot I've taken: http://img98.imageshack.us/img98/533/seeingtheseers.jpg