I had a very similar problem. I edited the Home Page of my course to add course number, etc. I saved the changes. I viewed all pages and went back to the home page--the changes weren't there. I repeated this a couple of times and noticed that in addition to the changes not being saved, the "Last Edit" date on the Pages page was not changing.
I did the edits one more time and this time I clicked "Save and Publish". Voila, the changes have been made!
I also found that if I did another change and clicked "Save", the page was updated.
p.s. In my case, the support people had just populated the course with the content from last year's course page.
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