@marcosmyara:
Tough break. I have *zero* experience with wordpress, but I can make a few suggestions based on my experience with this caching problem:
It sounds to me like your site is being served from static pages by the apache/nginx webserver instead of php/wp scripts.
My setup is with nginx, and w3tc (asked me to) install rules in the nginx config file that specifies roughly the following: "when a static file exists in a certain directory, then rewrite the current request to that file and serve it instead of sending the request to php-fpm."
It is conceivable that your setup has similar rules (with either apache or nginx). One thing that you might consider is to look into the
wp-content/cache/page_enhanced/
directory and poke around to determine if the home page that is being served is one of the static files in that directory. If so, I believe you can totally blow away that page_enhanced directory (or to be safe, move it to another name), and your webserver should then pass those requests on to your php/wp backend.
More generally, you want to get your webserver to stop serving these static files.
