I finally worked out (with a lot of help) how to delete numbers from my preface pages. I did the lot; got the file the way CreateSapce wanted it and then half way through uploading the new version, my telephone line went down.
You can see why some people get paranoid.
I'm trying again right now. Here's hoping I get the thumb up from CreateSpace. I can't wait another six weeks for a proof. I'm not getting any younger.