Problems Sorting Data in an External File (.txt)

[Superlegend21]

I'm creating a Leaderboard for my Two-Player Dice Rolling Game, I want the Data inside the File to be Sorted in order and neatly presented.
Objectives:

• Sorts the Scores High to Low
  
• Saves the Player's Name and Score in External File
  
• Prints out the Top 5 Winning Scores
  

My problems are:

• It prints out the first line which I don't want it to as it outputs the Headings (you can copy the code and try it yourselves) and outputs the name's and scoring which is good but not in the right position
  
• It overwrite the names and scores for each of the two players names and scores, every time I retry the program
  

I need the data neatly as shown below:
The dots are the Spaces

Position.....Name.......Score
.....1..........John.........25
.....2..........Adam.........56

# -------------- Leaderboard --------------

def leaderboard():

    file = open("Leaderboard.txt",'w')
    file.write("Position        " + "Name        " + "Score" + "\n") #<----- Heading
    file.close()

    file = open("Leaderboard.txt",'a')
    file.write((username_1) + ":" + (str(playerScore1)) + "\n") #<---- Stores Player 1's Name and Score
    file.write((username_2) + ":" + (str(playerScore2)) + "\n") #<---- Stores Player 2's Name and Score
    file.close()
    
    
    file = open("Leaderboard.txt",'r')
    readthefile = file.readlines()
    sortedData = sorted(readthefile, reverse = True)  #<---- Sorting the Data

    print("==============================")
    print("    Top 5 Winning Scores")
    print()

    for line in range (5):  #<---- Outputs the Top 5 Players
        print(str(line + 1) + "\t" + str(sortedData[line]))

leaderboard()

#------------- OUTPUT ------------
==============================
    Top 5 Winning Scores

1       John:25

2       Position        Name        Score

3       Adam:56

[Superlegend21]

I have Fixed the Issue now!!!
The Heading Part wasn't required in the file.write
The Data was getting Sorted but not Correct now that is Fixed

username_1 = "Adam"
username_2 = "John"
playerScore1 = 56
playerScore2 = 45

def leaderboard():

    file = open("Leaderboard.txt", 'a')
    file.write((str(playerScore1)) + "       " + (username_1) + "\n")
    file.write((str(playerScore2)) + "       " + (username_2) + "\n")
    file.close()

    file = open("Leaderboard.txt", 'r')
    readthefile = file.readlines()
    sortedData = sorted(readthefile, reverse = True)

    print("==============================")
    print("    Top 5 Winning Scores")
    print()

    print("Pos        " + "Score     " + " Name")

    for line in range(5):
        print(" " + str(line + 1) + "\t    " + str(sortedData[line]))

leaderboard()