I cannot reproduce your problem as I understand it. ie works fine for me in XP 32 bit SP3. Possible corrupt configuration file. Try this. Create a new configuration file and then merge your existing configuration into this new file. This will add your current Home Device at the bottom. Try then dragging your buttons on the existing pages into new Home pages you create in the top 'Home' activity.

If this does not work, email me your config to the email addy on my RC profile and I will have a look.

And, on a hunch, after re-reading your original post. If you are wanting to return to the Home Page, use Special Action for 'Home'. If you want to return to a specific page other than the first page in your home activity, use a Page Jump.