V3.70~9 tank "Remaining" calc inverted?

v3.70~9 tank level reports correct level, but Remaining calc is apparently inverted, showing tank volume level rather than remaining volume.
17 gal tank
empty sensor value 49.0cm
full sensor value 2.0cm
Sensor value 38.9cm
Full % shows 21% (would be just under 4gal)
BUT Remaining shown 4gal

Hi what kind of sensor are you using?

And can you share sone screenshots of the settings?

Matthias

Safiery Star Tank sensor. Screenshots shots attached. I have not yet configured the Custom Shape. Thanks

Ed