investigating Inconsistent A/A WYPT behavior with unused markpoints

[Tholozor]

If the A/A WYPT reference option is boxed on an unused "zeroed out" markpoint, the system seems to arbitrarily pick either waypoint 0 or waypoint 59 as the reference. Not sure what the actual behavior should be here, as Null Island coordinates should technically still be a valid reference.

AA_WYPT_MK.trk