Deleted the stylesheet and it's still loading

I’m getting some weird behavior. I installed WP Total Cache 3 and I’m able to see changes to my style.css file. However I can’t see changes to another stylesheet (responsive.css) in the same directory.

I deleted the responsive.css file and it’s still loading. I’ve cleared cache and tried it on a different browser. I deactivated and deleted the plugin and it’s still showing up.

what gives?

thanks!