Hey Bob,
Nice catch - you're correct that it appears that this display name has been swapped to another account.
The main way RuneTrack typically prevents this from happening is via the Name Change Contributions page (
http://runetrack.com/contribute_name_change.php), which relies on the community to transition any account on which a display name change is detected to its new display name, before that account's old display name is taken by someone else. This prevents any overlapping from occurring. In the past this has worked nicely to prevent this issue, but this month it seems that the massive amounts of F2P players who lost their highscores were clogging up the system a bit, as all F2P players were flagged as possible display name changes.
I went ahead and cleared out the Name Change Contribution queue (which was at ~7,000 due to the F2P highscore loss), so hopefully this system should prevent this from happening again.
