Airway J70 between BLUIT and EPH becomes J12 on the map - intentional?

[skysail]

This topic was created for a user in our Discord server who did not wish to create a topic himself.
The original message can be found here, and the following is the relevant transcript.

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@funky hut

Are you (Navigraph) sure that J70 between BLUIT and EPH becomes J12 on the map?

@Naasfird

From EPH to SEA it’s actually J12, J70 and J90. And from BLUIT to EPH it’s J12 and J70. So J70 does go cross country, but has additional names close to the west coast

@funky hut

Thanks for that explanation. Makes complete sense. Should have looked at Skyvector before asking the question.
However, sorry if I’m being pedantic but the labelling BLUIT to EPH should be J70/J12 (or vice versa) per the labelling on Skyvector joint airways to avoid any ambiguity and Navigraph is misleading at best and plain wrong at worst?
That said, Navigraph and all its people are simply the best.

[srcooke]

Either there is an issue with the charts navdata or charts aren’t depicting the airways correctly.

PMDG data lists J12 and J70 linking BLUIT to EPH:

J12 003 BLUIT 47.405933 -120.418197
J12 004 EPH 47.377919 -119.424003

J70 029 EPH 47.377919 -119.424003
J70 030 BLUIT 47.405933 -120.418197

Additioinaly PFPX navdata also depicts the airways correctly:

[skysail]

Thank you for the investigation @srcooke ! We came to the same conclusion (the data is correct) and we will investigate potential issues with the map rendering as soon as we can!