Develop a Python program that takes two user inputs as the lower and upper limits (inclusive) and calculates the sum of the squares of all even numbers in that range. The program should display the individual even numbers and their squares, as well as the final result of the sum. The program should handle invalid inputs (e.g. non-integer inputs, upper limit less than lower limit) gracefully by prompting the user to enter valid inputs. The program should also be well-documented with comments and follow PEP 8 style guidelines.
This prompt doesn't seem malicious.