Hi,
How old is your daughter? I am 14 and I was just curious because I came to this site trying to find kids my age with this disorder so i could relate. I'm not to sure about the diagnostic test they do but for me it was sum simple test and nothing more. My attitude fits the disscription so i guess i never really questioned it.
About your last paragraph i do believe that sumone should have told you more imformation on this. Bipolar disorder is different on younger people and changes as people become older (as i read). You can PM me if you want more info or about anything else.