You’re not doing anything wrong. The problem is that the weather analysis pulls degree days for each bill period. In your case there is only one period with annual usage, so there isn’t monthly degree day data to generate a nice looking apportionment of the heating load. The usage then ends up getting apportioned across the months by number of days. I’m disappointed that this issue wasn’t exposed before release in VT. That chart is obviously a poor choice for the report in cases like yours. We are working on an alternative.