Kicker core 2 w-cog set up

Got a new kicker core 2 with cog .

Tried an ftp test in wahoo system and my cadence and power was way off . Like it was saying power should be 150 and cadence 80 . When I got cadence even close to 80 my power was 380. Is that normal it seems way off ?

I originally had my wheel set to 700x45 ( my tire size ) and moved it back to the default of 700x28 .

Thanks for any input ,

John