Allows researching multiple technologies at the same time, evenly distributing the workload between all available labs.
Providing the player with new tools or adjusting the game interface, without fundamentally changing gameplay.
When I researched level 4 of 50 of Solar Productivity (another mod) in "First in Queue" mode, it researched the whole "stack" of technology, granting me level 50 instead of level 4.
Should be fixed now.