Yet more playing with the tool has brought to light another oddity...
In the OWE Planner, putting
From: NRT To: ~SWP
Gives: SYD and CNS (as expected), but also ROR and GUM (unexpected)
The Oneworld Explorer Validator shows the following as valid (as expected)
LHR-NRT-ROR-NRT-GUM-NRT-SYD-JFK-LHR
But it does show each flight as intercontinental
