Hi @Eddoman thank you for reaching out.
You have picked up on one of the key limitations of the energy insights report, that it is based on estimations of what devices have been used.
The smart meter is capable of measuring how much energy is used and at which time, but not how many or which device was responsible for it's usage.
The report is generated on modelling of what kind of devices share the same kind of usage patterns, but on an individual level, accuracy can vary quite a lot.
Kind regards,
Xander