Fragment cache still being read after deletion

Okay, let’s say I’m on a controller index page that is setup to use
fragment caching. When I refresh the page, a cache is created, all is
good. When I delete the cache file via Apple Finder, and refresh
again, the log is saying Fragment read, not cache created. I’m using
filestore (default) but it seems like the fragment is being read from
memory. Anyone know why this is happening?

Also, my rake tmp:cache:clear does not work. Thanks for any help!