(Powered.png) is the same image from mine, with a dust less. (this image was posted by Neospector)
What's the difference? The dust is pointing in both images. It's on linear shape, on that power both sides.
Look "mnri9.png", where the dust, in the same shape, power two pistons. Turning just one lever on will have the same effect as both levers on.
The linear dust power both blocks in this case. The only difference is because it's connected to another dust.
The dust from example is not powered, I will consider if you showed a image where the dust is powered.
Why working as intended if the dust is pointing to the fence? I know that it's named "direct powering", against to "indirect powering", where a block is powered by another block, powered by a dust.
I'm not impressed of that: the photos I uploaded are 8 months old.
I'm impressed that all this time passed and nothing was fixed.