Quark Pipes:

Put items in with a hopper. Items prefer to flow down, then fowards, sideways, and lastly upwards. Disable specific pipes with a redstone signal. Items can also fall out of and into open ends.

should be

Put items in with a hopper. Items prefer to flow down, then forwards, sideways, and lastly upwards. Disable specific pipes with a redstone signal. Items can also fall out of and into open ends.

I think it should be like this:

Put items in with a hopper. Items prefer to flow downwards, then forwards, sideways, and lastly upwards. Disable specific pipes with a redstone signal. Items can also fall out of and into open ends.

but yes, definitely a typo