dr prius app on Toyota estima

Hi and thank you for allowing me to join your community. I would like to apologise for posting here "non Prius related topic" but it seems like some of you might be able to help me.
I have 2008 Toyota estima (80k on the clock plus whatever was rolled back before car was shipped from Japan to UK) . Im using dr Prius and Hybrid Assistant to monitor my EV battery. Im using Dr prius recommended obd and it seems to work ( roughly). My car has 21 blocks of battery but dr prius monitors only 15. Please find attached file. Anybody knows why? Thank you in advance.