Why does Online Python Tutor present this immutable integer as two different integers graphically?

In Fluent Python, By Luciano Ramalho, Chapter 8, Copies Are Shallow by Default, there is an example:

>>> listOne = [3, [55, 44], (7, 8, 9)]>>> listTwo = list(listOne)>>> listTwo[3, [55, 44], (7, 8, 9)]>>> listTwo == listOneTrue>>> listTwo is listOneFalse

The author suggests that we should run through this code using Online Python Tutor to see what is happening step by step.

I executed the first two lines using Online Python Tutor, and this is the screen shot I got:

What confuses me is:

All three elements from the each list, the immutable integer, the list and the tuple are actually the same, e.g.

listOne[0] is listTwo[0] #TruelistOne[1] is listTwo[1] #TruelistOne[2] is listTwo[2] #True

So why the graph shows two separate 3s at the beginning of their respective list?