LoadCase ids - keys in dictionary not same as keys of isubcase_name_map

[Vybornak2]

Hello, I do not know, if this is intentional or not, but in some of the models I am getting different keys in these objects:

op2.op2_results.stress.ctira3_stress
op2.isubcase_name_map

is this expected behavior?

Actual output

ctira3_stress keys:
dict_keys([
    (1, 1, 1, 0, 0, '', ''),
    (2, 1, 1, 0, 0, '', ''),
    (3, 1, 1, 0, 0, '', ''),
    (4, 1, 1, 0, 0, '', ''),
    (5, 1, 1, 0, 0, '', ''),
    (6, 1, 1, 0, 0, '', ''),
    (31, 1, 1, 0, 0, '', ''),
    (32, 1, 1, 0, 0, '', ''),
    (33, 1, 1, 0, 0, '', ''),
    (34, 1, 1, 0, 0, '', ''),
    (35, 1, 1, 0, 0, '', ''),
    (36, 1, 1, 0, 0, '', ''),
    (37, 1, 1, 0, 0, '', ''),
    101
])

isubcase_name_map keys:
dict_keys([1, 2, 3, 4, 5, 6, 31, 32, 33, 34, 35, 36, 37, 101, 0])