Paypal "item_number" is coming in as literally "item_number" instead of user id #95

    <form action="https://www.paypal.com/donate" method="post" target="_top">
    %[#] Required hosted button ID
    <input type="hidden" name="hosted_button_id" value="%[BUTTON_ID]">
    %[#] Use user's email and aid if logged in
    %begin [user]
    <input type="hidden" name="item_name" value="%[USER_NAME]:%[USER_EMAIL]">
    <input type="hidden" name="item_number" value="%[USER_AID]">
    %end [user]
    %[#] Generate return URL based on current page
    <input type="hidden" name="return" value="%[RETURN_VALUE]">
    <input type="image" src="https://www.paypalobjects.com/en_US/i/btn/btn_donate_SM.gif" name="submit" title="PayPal - The safer, easier way to pay online!" alt="Donate with PayPal button">
    <img alt="" src="https://www.paypal.com/en_US/i/scr/pixel.gif" width="1" height="1">
    </form>