Sounds like something is off...
Has the Kamado thermo been verified?
Are you using analog, digital, or bi-metal thermos?
Should have been done by now if everything has been verified.
If everything ok, should be another hour... nearing the end of the stall.
If tired of waiting; wrap it and finish off in the oven above 300.
Lang 84 Deluxe Kitchen known as "The Glamazon" , Custom Klose Backyard Chef... of Snot, and a 22.5 WSM
Lang 60 Mobile - The Damsel II, Lang 48 Patio - The Damsel, Bubba Keg Grill - RIP, Double Barrel Smoker and a BSKD