Looking at your first link. When I view the first tab 'Page Speed' then click on the row for 'Optimize images' which is rated as an A by the way. I see the listing of images. From that listing I see very few image which are from your hosted media library.
Take the first image:
http://i1.wp.com/smellslikeinfinitesadness.com/wp-content/uploads/2013/09/vista_chino_peace.jpg?resize=300%2C300 could save 15.9KiB (17% reduction).
Not the URL is not your website. This is probably because you are running JetPack which copies your images to the WP site like a CDN (Content Delivery Network). These remote images cannot be processed by Smush.it. Only local images on your site.
Continuing on the images list I see the second image is on your site.
http://www.smellslikeinfinitesadness.com/wp-content/uploads/2012/05/rain-on-window-glass1.jpg could save 8.5KiB (4% reduction).
So try this. Go to Settings > Media then look for the Smush.it section. You should see a checkbox to enable debug output. Set the checkbox and save the settings. Then head over to Media > Library and find that image in your listing. Check the last column of the image. what does the Smush.it information read? DO NOT CLICK the SMUSH.IT in the column. Instead on that row set the checkbox. Then select the Smush.it option in the dropdown above the media listing. Then the button to the right of the dropdown.
The bulk of the rest of the images listed in the speed test are for theme or plugin images. Theses Smush.it does not and will not process.