Just to make sure:
Did you rotate the module which appears not to fit 180°, that way "aligning the notch on the Memory module with the notch on the socket."?
The non-symmetric notch separates the pins to prevent inserting the modules the wrong way.
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Just to make sure:
Did you rotate the module which appears not to fit 180°, that way "aligning the notch on the Memory module with the notch on the socket."?
The non-symmetric notch separates the pins to prevent inserting the modules the wrong way.