Your footprint posts are sorted by the date you select for each footprint. So if your footprints do not show in correct order, this is due to a wrong date and time.
To fix the order of your footprints, select the footprint that is not in order, edit it and choose the correct date.
Please be aware of timezones! 9am in one timezone can be after 10am in another timezone, even if it is the same day!