5.8G interface tx power can't set to 30dbm

I am useing capsman to manager some APs, all the ap is the same softeware(6.3.42) and hareware version,using the same configuration from the capsman.
I don’t know how,some status of the APs is showing 5.8g interface tx power is 30dbm while some is 17dbm.
Is anyone know why this happen ?

Do you have some that are international and some that are US only?

no,country is not set. 2.4G work fine with 30dbm

Probably that access point uses channel 36-48. That’s 17dbm when no country is set.