[Dave at Pelican Parts]

The flaps are working as designed. However, your understanding of what they are actually doing is imperfect.

Having the right-side flap "closed" actually creates a nice little duct for air coming off the fan to be pushed through the cooler. If you look closely (assuming you have an engine available to you with the flaps in but the engine in off), you can see that the leading edge of the "closed" flap is up somewhat from the edge of the fan shroud. This means that a portion of the air going to that side of the engine is being diverted and pushed down through the oil cooler.

Similarly, when the flap is "open", the edge of the flap moves downward, blocking this path for the cooling air.

In other words, don't freak out--it's perfectly normal.

--DD