I made a homebrew race with 60 feet Darkvision and made a charavter with it and a couple Warlock levels, took Devil Sight Invocation, the two seem to have stacked into 180 foot Darkvision on the sheet.

Is this correct, or incorrect?

If incorrect, is it some bug or somesuch, or, did I just screw up the Darkvision on the race somehow?

If bug, known bug?

If me messing up, anyone have some idea what I might have done incorrectly?

As far as I know it shouldn't be stacking.

You used the modifier that adds to a creature’s Darkvision. Even if the creature has a Darkvision of 0, it still works, which is why you didn’t notice before.

Instead of (Modifier: Sense->Subtype: Darkvision) you want to use (Modifier: Set Base->Subtype: Darkvision).

I hope that helps.

It helped! Thank you Sposta!

Now it only shows as 120 feet of Darkvision, which I assume is right.

That is right, right?

If I recall.

Happy to help.