Create estimated readings even if required before all or after all available meter readings.  For example, we calculate emissions from Jan 1 even if 1st meter reading was taken on Jan 20th. This is the way the old algorithm worked.

make sure that bars displayed in the same order as specified in settings (e.g. heating, elec, car, surface, air).

changed meter algorithm to create estimated meter readings at the start and end of the accounting periods. This alogorithm ensures that over several years, as long as you have some real meter readings on the start/end dates, the overall CO2 / energy calculations are precise; not true about old algorithm.