Blogger Problems

Is there anyone who knows what is going on with blogger? I have had a header off and on for days. I've moved it from one place to another, only to lose it after a day or so. This morning, someone wrote a comment saying she was glad to see my header back. By the time I read the comment, the header was once again removed!

This is not the only problem that is going on with blogger either. In fact, right now, this editor is not showing up correctly. Also, I have gone to customize, and there would be large letters above rather than the regular appearance. All manner of things have been happening. What is the problem? Does anyone know? I would like to have my banner appear each time someone views the blog.