If Chris has a "Tea" card and his largest set are 2 "Temaki," 2 "Edamame," and 2 "Pudding" cards, does he only score 2 points for the "Tea," or 6 points?
The Tea card can only count the cards in your single largest set of cards with the same background colour.
When you have multiple possible largest sets due to a tie, you can still only use it against the cards from a single set, so you have to pick one of them. So the Tea card is only worth 2 points in your example.
The rulebook (page 15) states:
End of the round: Count the number of cards in your largest (or tied for largest) set of cards with the same background color. Tea is worth 1 point per card in that set.