'Abaqus replay file not consistent with with node labels displayed in GUI

I wanted to create some sets in an Abaqus model with a python script, using the replay file as reference for syntax. The GUI shows these node labels: (I'm concerned with node 2733)

Querying the node also gives the same label, along with its coordinates:

Coordinates of node 2733 :1.477119995E+03,1.527209961E+03,-647.083008

But when I check the replay file after picking this node and creating a set manually, this is what I find:

a = mdb.models['LM735P_fail_P000_Sub_30'].rootAssembly
n1 = a.instances['PART-1-1'].nodes
nodes1 = n1[2718:2719]
a.Set(nodes=nodes1, name='loadnode_test')
#: The set 'loadnode_test' has been created (1 node).

What could be the reason for this discrepancy? (the node label shows up as 2718)

This did not happen when I created an "Unsorted" set, which only adds to my confusion.



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