Hey Webby
I tested this earlier. On the basic caching nothing is added to htaccess. From the developer:
Basic caching uses PHP to serve up pages that are stored on disk. So PHP, WordPress and Wordfence execute and interrupt execution to serve up a pre-rendered page early in the execution cycle. This provides a nice speed increase without having to edit your .htaccess. Some sites can't do this which is why we included the feature.
Falcon caching adds stuff to the htaccess and I can verify that it does place code at the bottom of the page, but it only did it when my computer's ip wass reported from an outside ip address (like one that didn't begin with 10. or 192.168. etc etc)
Check your ip address and make sure its not reporting as one of those.
tim