-A redstone torch is placed on a block, witch has also a lever on it.
-If I change manualy the position of the lever, the torch will go off or on, following the power state of the block, that's okay.
-But if a plugin, like CraftBook, change itself the position of the lever, the power status of the block and so of the torch on it isn't refreshed. So the torch keep always the inverted state the block had when the torch was placed.
-And if I add, for exemple, another torch on a side of the block, its power status will be updated, but just once. It will not refresh itself after that, and keep again the same state.

The joined image explains more clearly the problem
Sorry if my english is quite bad xD