Wha? This map error has nothing to do with me <G>
It's a reference to Dallas Snell, a former Origin employee (worked on Wing 2... remember General Snell at Ghorah Khar?)... apparently he once created an org chart that was just his name with an arrow pointing to himself... and that's where the jump point comes from.
If you want an in-universe explanation, it was colonized using hopper drives, and some gravitic anomaly creates only one jump line which leads back to itself.