replicate_do_db: twice... and a question

[urkapd]

Is it right to have this result with a 'show slave status'?

(...)

Replicate_do_db: dbname, dbname

(...)

I mean, to see the dbname twice? or there is something wrong in mysql
master or slave config?

I have to put the "replicate_do_db" variabile in slave config too?

and a question:
I'm replicating a db (db1); how can I start to replicate even a second db,
without any kind of troubles in the master and/or slave? what is the best
way to do that?

thank you in advance

bye bye

MAS!