Windows 7, Java SE 7u60
Put the summary of the bug you're having here
What I expected to happen was...:
That redstone was turned off.
What actually happened was...:
Redstone still was turned on, as you can see in the third and fourth screenshot.
Steps to Reproduce:
1. Take Tripwire Hook and Tripwire.
2. Make a simple redstone system.
3. Activate the Tripwire Hook and deactivate.
PD: Sorry for my English.