Hey Game Programmer,
So in your first scene, you are editing the values of the Point Light instead of your Directional Light actor. There could be a number of reasons, but you always want to make sure the object receiving shadows, and the object casting shadows have a high enough resolution to produce the crispness in your shadows.
Notice in the test scene we have no Skylight or Directional Light (both have options to cast shadows)? When it comes to rendering and setting up a test scene, you want to have the simplest light set up as possible while still getting your point across. This will help with iteration times between builds and stages of your project.
Cheers,