The cache IS at the posted coordinates.

The Challenge
Find at least 11 caches for each calendar day in September, October, and November.
Feel free to click on the Project-GC banner, below, to see if you've completed this challenge:

Just as many leaves change colour in Autumn, so does the colour of the days on your Groundspeak statistics calendar once you find 11 caches. Your mission is to make those changes happen for all 91 days in those three Autumn months.
The Details
Logging this Cache
You can sign this cache’s physical log sheet before you complete its requirements. But do not log an online “Found It” until you’ve signed this cache’s physical log sheet and shown that you’ve met the challenge requirements. We’ll delete any premature “Found Its.”
If you sign the physical log sheet before you complete the requirements, then you can log an online “Write Note” to help you remember this fact.
Providing Proof
If your Groundspeak finds calendar can be viewed by the public, then you don’t have to prove you’ve met this challenge’s requirement; we’ll simply check your Groundspeak profile’s statistics page.
If your Groundspeak finds calendar is private, then you must prove you’ve met this challenge’s requirement. The easiest way would be to upload a screen shot of your calendar in your online log:

Less easily, you could log a list of 1,001 (11 x 91) finds that includes (at a minimum) each cache’s GCCode and the date you found it. The Project-GC challenge checker's output (see above) might assist you in this task:
GCQHKK 09/01/2009
GC1HP28 09/01/2009
GC1D57N 09/01/2010
GC1YG6V 09/01/2010
GC209NC 09/01/2010
GC214WX 09/01/2010
GC27XQ8 09/01/2010
GC2930M 09/01/2010
GC1ACY9 09/01/2010
GC2AGW2 09/01/2010
GC2EDDE 09/01/2010
GC1KGYF 09/02/2009
...
GC2WF9Y 11/30/2013
Credits
We got the basic idea for this challenge from leopold22’s “Challenge: 366 Calendar Days x 10 Finds/Day” (GC3TH5K).
Congratulations to Trefoil/Voyager for being the first to complete and find this challenge.