Vertical flowing water merges with horizontal flowing water
When flowing water falls vertically past water flowing along a flat surface, the vertical water flows into and against the horizontal water, increasing the water level and preventing items to flow downstream.
See middle-left of picture for visual.
Environment
Windows XP, 2GB ram, current Java, LWJGL 2.8.4
Created Issue:
Vertical flowing water merges with horizontal flowing water
When flowing water falls vertically past water flowing along a flat surface, the vertical water flows into and against the horizontal water, increasing the water level and preventing items to flow downstream.
See middle-left of picture for visual.
Environment
Windows XP, 2GB ram, current Java, LWJGL 2.8.4

Just prevent the water from falling down with some signs.
Liquids gonna liquid.
I wanted it to flow next to it. The picture contains an automated harvester.