They did. But they ddnt fix anything because its still happening.
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During the following time period, players experienced difficulty logging into the North American/European data center Worlds.

We are pleased to announce that the issue has been addressed. We apologize for any inconvenience this may have caused.

[Date & Time]
Sep. 20, 2013 from 11:09 a.m. to 11:55 a.m. (PDT)

[Details]
Difficulty logging into the North American/European data center Worlds.

[Cause]
Network Congestion

[Affected Service]
North American/European Data Center Worlds:
- Adamantoise
- Balmung
- Behemoth
- Brynhildr
- Cactuar
- Cerberus
- Coeurl
- Diabolos
- Excalibur
- Exodus
- Faerie
- Famfrit
- Gilgamesh
- Goblin
- Hyperion
- Lamia
- Leviathan
- Lich
- Malboro
- Mateus
- Midgardsormr
- Moogle
- Odin
- Phoenix
- Ragnarok
- Sargatanas
- Shiva
- Siren
- Ultros
- Zalera