DillbroSwaggins

Hello friends, I've been chasing a misfire in my '17 Silverado 1500 5.3L for a while and noticed something confusing in my scan tool. (Innova 5160rs) I have 2 MAF readouts on the ECM live data, very far apart. Only 1 in the OBD2 live data. The first readout (#14/482) reads 0.53 lb/min at idle, which is within normal range. The second readout (#308/482) reads over 200 lb/min at idle, which is NOT within normal range at all. I know this truck only has 1 MAF. Why might I have 2 readings here? And why would the second one be so dang high?