Reply To: page 1 gone & page numbering in CS4

Double-clicking on the black arrow above the Page 2 thumbnail, in the Pages panel, should also bring up the Numbering & Section Options dialog and setting it back to Automatic Page Numbering should make the document start at Page 1 again. I've never had problems with this, so I haven't a clue what could be wrong here if that doesn't work.

If you can't get it working, you could start a new document with the same settings and move your pages from the faulty document to the new one — by selecting the pages in the Pages panel and then going to the fly-out menu to choose Move Pages.