Because TWC has trained people to make mountains out of molehills.
TWC doesn't retire the names, the National Hurricane Center does.
Actually, you are also wrong, the NHC nor the NWS do not retire hurricane names. Names are retired by the WMO (World Meteorlogical Organization).
Why does everyone here seem to think only Ike will be retired? In 2007, we had three storms retired (Dean, Felix, and Noel). Gustav was more damaging than all three of those storms combined, and Hanna was deadlier than any of those three storms.
Here are my predictions, percentagewise:
Arthur - 4% - not severely damaging.
Bertha - 3% - strong, but once again not severely damaging.
Cristobal - 2% - forgettable, barely damaging at all.
Dolly - 60% - Damage estimate still remains at $1.52 billion several months after its landfall.
Edouard - 5% - Damage total unknown, but once again, probably not severe.
Fay - 25% - Current damage estimate is $180 million, which is significant (especially for a tropical storm), but nothing extremely severe (far short of $1 billion mark).
Gustav - 95% - Very severely damaging, I would be very surprised if it is not retired.
Hanna - 85% - Very deadly, although Gordon (which affected the same area) of 1994 wasn't retired, yet again, Jeanne of 2004 was retired.
Ike - 100% - Third most destructive named hurricane in U.S. history, pretty obvious candidate.
Josephine - 1% - just gave Cape Verde a little breeze and nothing else.
Kyle - 5% - While not severely damaging, Canada got Juan of 2003 retired. However, Kyle was less damaging than Juan, so I don't think it is very likely Kyle will be retired.
Laura - 1% - Fishspinner while tropical.
Marco - 5% - Damage unknown, but probably not severe.
Nana - 0% - Total fishspinner.
Omar - 15% - Still waiting for damage total. Probably more damaging than Edouard and Marco, but we will have to see whether the damage is severe enough for retirement. This is exactly what we have been doing with T.S. Erin last year.
Paloma - 55% - Current damage estimate is $1.4 billion, but we will still have to wait if that estimate is accurate.