my father says i don't have manners

my father says i don't have manners. here's what went down:
-I sneeze
-sister says bless you
-I say nothing
-dad makes me say "thank you"
- I say thank you
-he says I have no manners and looks at me with disgust


One: I DO have manners dammit!
Two: I always say thank you to a bless you and the one time I decide not to I'm labeled as the girl with no manners WTF! XP screw this family and their fucking bullshit!