Hello,
1) Your custom font won’t appear on Typography section. It’s necessary to specify it manually for required selector in custom.css, for example:
h1 {
font-family: cs_regular;
}
2) It appears to be some plugin functionality. Please try to deactivate you plugins one by one to define which one.
3) Unfortunately there is no such option.
4) Try to clear your browser cache. We can’t see Legenda logo on mobile device. You can set up slider visibility for mobile devices on Mobile Visibility section of Revolution Slider options.
Regards,
Jack Richardson