Here are some statements of my own, typed quickly on a phone before I head to work:

-Electrons do not in general have quantized energy; only bound electrons have a discrete energy spectrum

-Electrons do not necessarily have a single energy; although energy eigenstates form a basis that can describe all states, very often the electron won't be in a pure eigenstate

-Single electron models are simplifications; in general, atoms will have multielectron states that are very difficult to write down or reason about; it's deep and non-obvious why single electron models do so well at describing behavior of multielectron wavefunctions