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Readings could differ from board to board, do not expect exact same value.
Also CPU type is important; i7 will give lower values than i5, which will be lower than i3.
RTC signals look good.
So, can you see 3.3-0-3.3V drop pulse at PM_PWRBTN_L when trigger SMC_ONOFF_L?
In such case (at same moment) should catch a high pulse at PM_SLP_S4/3_L signals.
Trigger SMC_ONOFF_L several times and maintain voltmeter connected at these signals.