My problem came from nothing, I did nothing was doing nothing it just started happening.

Clear all local and web caches, including those inside Joomla, I then purge the sef urls, and the sef cash.

open chrome, FF or IE and go to the home page, works perfect.
Click on any link in the site, this works perfect, now click on any link, or home, and you are taken to the same page
The only way to fix it is to purge the sef, but then as soon as another link is clicked that link becomes the default page for everything.

Looking at the SEF urls, there are no duplicates and all lages look unique.

I uninstall all aspects of Joomsef, install again and same issue,.