Negative individual device usage

[turbid grotto]

Hello! Is there a way to figure out what is contributing to negative values for individual device usage -- I don't have any devices that should generate negative values

well, and it looks like that's untracked consumption anyway -- but I guess then i'm just confused how I get negative values at all when nothing in my home should be selling to grid (I think that's what negative values represent?)/etc

[sharp kayak]

Probably just a little bit of sampling error.