Fix bug causing graph labels to be off by one index
Fix bug causing graph labels to be off by one index

shmick/HeaterMeter,shmick/HeaterMeter,shmick/HeaterMeter,shmick/HeaterMeter,CapnBry/HeaterMeter,CapnBry/HeaterMeter,kdakers80/HeaterMeter,shmick/HeaterMeter,kdakers80/HeaterMeter,dwright134/HeaterMeter,CapnBry/HeaterMeter,kdakers80/HeaterMeter,CapnBry/HeaterMeter,dwright134/HeaterMeter,shmick/HeaterMeter,kdakers80/HeaterMeter,shmick/HeaterMeter,dwright134/HeaterMeter,CapnBry/HeaterMeter,dwright134/HeaterMeter,dwright134/HeaterMeter,dwright134/HeaterMeter,CapnBry/HeaterMeter,CapnBry/HeaterMeter,kdakers80/HeaterMeter,kdakers80/HeaterMeter