Dispenser Splash Potion bug

Put the summary of the bug you're having here

I expected the dispenser to shoot the potion out and give the effect to me.
Describe what you thought should happen here

What actually happened was the potion was shot out really far
Describe what happened here

Steps to Reproduce:
1. Place a dispenser.
2. Put a splash potion in it.
3. Power it.
4. Also redstone torches and blocks don't seem to power the dispenser and dropper correctly.