The bee modifiers work differently than every other modifier ever in the game, including the ones for flowers. Instead of adding to the modifiers, like the other ones, it multiplies the pre-existing values, which causes some weirdness, like the "Flight" research to have no effect.
Attached there's an image with the math done the usual way (in red, for all generators) and the anomalous way (in blue, only for the bees), including how they relate to the totals displayed on the side bar.