Issue Description:

Fluid tank duplicates buckets

What happens:

Fluid tank is connected to reservoir by fluid conduit. Place empty bucket in top left slot in fluid tank and the bottom right slot fills with a stack of 1000 water buckets.

What you expected to happen:

One water bucket is filled.

Steps to reproduce:

1. Connect fluid tank to reservoir with fluid conduit.
2. Place empty bucket in fluid tank slot.
3. Profit...
   ...

Affected Versions (Do not use "latest"):

• EnderIO: 1.10.2-3.0.1.75_beta
• EnderCore: 1.10.2-0.4.1.41-beta
• Minecraft: 1.10.2
• Forge: 1.10.2-12.18.1.2011

Your most recent log file where the issue was present:

http://paste.ee/p/lLaDC

see #3507