E-Mail sync with Gmail

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I never saw the page that you have in your first post. Are you using some sort of gmail app? I just set mine up like any other email account. I have POP and IMAP enabled in my Gmail settings. There is also a drop down there that lets you tell gmail what to do when an email is accessed with POP. I set it to leave the email in the inbox. I have to log into gmail directly every once in a while to delete emails but they never download more than once to either the phone or my computer email program.