Put the summary of the bug you're having here

What I expected to happen was...:
I expected to shot only 1 time and that's all.

What actually happened was...:
Dispenser shot 2 times

Steps to Reproduce:
1. Add dispenser
2. At the end of dispenser, add a block
3. now on that block add a button
4. Place repeater and set: max which would point to that block
5. Click the button and you get 2 dispenses