Sadly, this theory applies only to objects that are in a steady state during flight. A steady state infers that the vehicle has a constant velocity and a fixed wing orientation. Bees have neither of these attributes in their flight patterns, and therefore fall out of this category and the rules that apply to it. An interesting point of fact is that bees absolutely cannot fly if their temperature drops below 30 degrees celsius. The bees flight is a high energy workout, consisting of two flat wings that are entirely reliant of the muscles packed into the thorax.
Bees are able to fly for the reason that many smaller birds can also fly.
Bees technically flap their wings above their backs. In doing so, all the air is forced from between the wings, creating a vacuum. This whole clapping thing causes the air to be sucked away from between the wings, which in turn causes turbulence enough to allow the bees to initiate and maintain flight. The clapping and sucking is also responsible for the buzzing sound associated with bees in flight. So - there you have it.