The extra arrays that are being printed are a result of the System.out.println(Arrays.toString(arr)); statement within your merge method. This line causes the program to print the array every time the merge method is called, which happens multiple times as the algorithm sorts the array step by step.

To resolve this issue, you should remove or comment out the line that prints the array in the merge method. Instead, you can keep the print statement in the main method so that it only displays the final sorted array once all the sorting is complete.