I'll gladly explain :)
For normal poles the entity in your cursor, before you place it down, is a generator (think steam engine) that only looks like a power pole. This is so that you can see the pole connections as you decide where to place it. This is the first entity that exists when you place a pole down, and it can generate power.
But, the power must be transmitted to your machines, which means you need an vanilla electric pole. So immediatelly I place a vanilla power pole on top of fluidic one. But this is a normal pole, so it will try to connect copper wires to other poles that are close so I destroy all those connections immediatelly. (You still see these connections sometimes as ghosts when blueprinting).
But this pole sometimes rotates when making circuit connections, and the generator entity below it doesn't. This looks really weird because you can see it's two power poles on top of another. And I can't disable the graphics (I think).
So, I also remove the original generator you placed, and replace it with an identical generator that is invisible XD
There might be a better way, but this is the best I could do with my limited modding experience at the time :)
Edit: corrected some of the reasoning. It's been a while :P
