Ok guys. Lemme know if there's any other issues. They claim to have solved the underlying error, but I had to figure out one of the other errors myself. Although they claim they didn't change access capability, I had to actually repair what files are to be defaulted to (i.e. index.php, etc) with .htaccess switches. Normally they default to things, but for some reason, this host stopped defaulting to the normal ones. That's why some of the links stopped working if you just had
www.scriptuo.com/smf (without a index.php).
Since I can finally surf to the site via my phone, it's looking better. I have yelled at nearly every engineer over there, and have the site up and working at another host, so if there are still issues after they claim to have "fixed" everything, I have already told them I will be switching today. If it's working OK now, then it gives me a bit more time to test the transfer instead of just "doing it" without regard to what gets broken in the move.