Success! Don't know if this will work for everyone, but I made sure I hit only the return key after a paragraph (not holding the shift key with it, which is necessary if wanting a new line but no empty line between). Then key in the page-break '*****' editing a webfile in google Chrome.
Hit only the return key before keying in a page-break!
Another thing... only do this when editing the webfile, but NOT in MSword before you've converted it into a webfile. Also you need to close and open the newly converted file before doing the line-breaks.
Simple! (we'll see if it works out for the next chapter).