The steering wheel paddle on my 2016 Volt has me flummoxed. Sometimes it will decelerate generating about 20-22 KW and it feels like it does when shifting to Low and coasting. Other times it will generate around 40KW and slow substantially faster. This happens at 20 mph or at 40 mph, uphill or downhill or on a level street. I can never anticipate what it will do. My question is, of course, WHY?