I have an issue pulling liquids from a smeltery (the multiblock) through a seared drain. I am making an alloy so there are interchangeably 4 different fluids in the smeltery, but I only want one (the alloy). I have set up a filer with the alloy whitelisted, and the other three liquids blacklisted, but when things jostle about in the smeltery and tiny amount of the wrong liquid gets pulled out screwing up the downstream bits and pieces. When it's stable it will properly pull the right fluid and ignore the others, but as things mix and the order swaps about in the smeltery - that's when it gets it wrong.

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