You aren't doing something wrong. It's just that nobody else on this forum happens to be going on that cruise. We have many members with school-aged children and September cruises just won't work for them (which includes me!).
You aren't doing something wrong. I also am taking a cruise in late September, and so far no one else has replied to my roll call thread.
2007 - Majesty of the Seas (Bahamas)
2009 - Enchantment of the Seas (Western Caribbean)
2010 - Freedom of the Seas (Western Caribbean)
2013 - Golden Princess (Alaska, roundtrip from Seattle)