I have the Alfa awus036h and in my secpoint admin I have my country set to Dominican Republic 30dBm but on the right corner of the screen it always says "Wifi power: 20dBm medium"
I have tested on 64 bit, and Bolivia has max power 20dBm, not 30dBm. So it is normal that he can't set it to 30 dBm, because it will give an error, see the picture. To set 30 db, use Belize
I have no difficulties in setting any country with 30 dbm. American Samoa, Bolivia or other countries