Deciphering Pingdom Results

I recently setup my site (www.ajschmidt.com) with W3 Total Cache, Amazon Route 53, and Amazon Cloudfront. When I run a Pingdom test, I get the results shown in this picture.

While most of the items take less than 100ms to load, I have two outliers that take 750ms and 649ms. They seem to be WordPress files (admin.php and wp-login.php), but I’m not sure why they might be taking a while to download. Can anyone provide any insight? I can elaborate on my setup if needed. Thanks