list-style not displaying

Hi! I have a problem and I really hope you can suggest me a solution. Every list (numbered and every list style) in a page or in a post is not working: it always shows lowercase letters, no matter which one I chose.
How can I set and use different lists’ styles?
Thank you in advance!
ps. In case it can help, this is my website http://www.mybusinessvirtualtour.com

https://wordpress.org/plugins/tinymce-advanced/