#1 : A hermie (hermaphrodite) is a plant of both sexes - male & female.

#2 : They most often occur from a female plant, that has been stressed to much, then starts to show male flowers a well.

#3 : Sure it makes bud, but it will be bud that has been pollenated.. AKA, it has been knocked up!

My two cents!

Anyone who would like too add some more cents, or correct my two, are welcome!