Many folks vacation during the summer months and don't alway have access to update their TB travels. When you 'grab' a coin from 'somewhere else' then drop it 500 miles away, it doesn't get credit for those grabbed miles.
So, IN THE FUTURE, please drop an email to whomever is holding it and ask them to drop it where you found it. Heck, sometimes one might forget that he even dropped it and will be thankful for the reminder!