Redstone triggering piston even if blockplace event is canceled

Hello,
We have a problem on our server right now.
We are using the "faction" plugin that prevents external faction user to place blocks where they should not.
The problem is that when they place a redstone torch, it is cancel, but "too late".
If they place it near a piston, the piston will be triggered and will push the block, then, the torch will "un pop".
We have the same problem with doors, they open for a very brief time when they place a torch nearby.

What can we do about it ?

Thank you very much.

 

submit the problem to the faction developer, they will make a new release with this problem fixed

 

This is not a faction related problem, but a bukkit one.
Faction cancel the event as any plug in would do, but the block is in fact put, then remove, and activate blocks around for a small amount of time.

If the road has holes, it has nothing to do with the car.