Well, I tried to fix the .htaccess problem myself, broke the site, had to upload it again, but I don’t know how to get the multisite thing going and am afraid to try. Also my host automatically puts /blog/ in the url between my domain and page title, which really is annoying. I think it’s time to find better web host.
And yes, I did mean I’m moving to their server as well. I haven’t looked into it yet, will wait until I change hosts. I’m not confident my current host wouldn’t screw that up, too.