Pages do not update

Hi,

I am new to this and have a problem I can’t figure out how to solve. When I add anything to my pages (pictures, text, videos, etc.), sometimes the pages don’t update. I believe I am taking all the correct steps, and clicking “update” before I view my page. There is no change on the page sometimes after I add something to it, or even delete something. Many times, whatever I delete will still be there after I update. Can someone please share your wisdom with me and help me fix this problem?

Eternally Grateful