Issue description:

When making a Fluid auto crafting pattern trying to insert more than 1 buckets worth will result in it reverting to just 1B.

Steps to reproduce:

1.Make Pattern Grid
2.Change to Fluidcrafting and processing
3.insert a bucket of water.
4. Try to increase the amount of water.
...

Version (make sure you are on the latest version before reporting):

• Minecraft:1.12.2
• Forge:2750
• Refined Storage:1.6.3

Does this issue occur on a server? [yes/no]
yes

The Issue only came up because the Cryotheum Coolant Units from Simply jetpack require 4 Buckets of Cryotheum. Using JEI to insert it resulted in no Fluid input at all. I just manually added it later.

For now, I've not had any big issues with the limitation but it seemed like something that might be an unnoticed sideeffect.

That is intended. You can reuse other slots too to include the same fluid.

For what do you need so much?

I'll leave it as it is (you can spread the 4 buckets over 4 slots).

It's an issue when trying to make pattern to fill Meat Feeder from Industrial Foregoing (can accept 128 buckets of Liquid Meat)

It CAN accept 128 buckets, but do you NEED 128 buckets at once?

Well let it be 64 per pattern or configurable (default 1, max 128) so anyone can decide.
In most cases it should be enough.