@FiXato Hah, thanks for catching those. I caught some of them myself last night, and fixed in the sources but couldn't be bothered to generate, commit and push a new version. It'll be fixed next round.
Cycles and Eevee are the two main render engines in Blender, there's probably a lot of differences, but the main one is that Cycles is a ray-tracing engine so it generates the image by bouncing light around. Slow but accurate. Eevee is a real-time engine, more like a game engine. Fast and works by approximations. Often good enough though.