Is Bachman Big Hauler Scale the same as G, Garden Railroads?

I have just started a new On30 layout with a 4-4-0 American DCC and the Bachmann DCC Command system.  I can't get the steam engine to accept a new unit 1 program.  It works fine as the default #3, all functions.  When I try to change it's number to 1 it doesn't accept it.  Or after issueing the program command it runs very very slow.  THe LEDs don't flash like described, not rapid flash, just the same slow flash.  I push #3 and it runs as it should.

Also how do I add sound to this engine?

Thanks,

Randy