So, like a good boy I've been using my Oyster card properly for the last
month, checking in and out. It's mostly been a travelcard, but for a few
days as a pre-pay.

So I wasn't quite expecting to have had an unresolved journey,
particularly as I've been careful to check in and out. It appeared when
the nice man in the station was refueling my travelcard for another month.
He cancelled it without charge, but I do wonder what it was doing on there
in the first place...