* Add 4 Part 44861 Black Plate, Modified 1 x 2 with Open O Clip on Top (Counterpart)
Seems you mean ‘Alternate’, not ‘Counterpart’
And you need:
— to give it an MID (‘1’ in this case as there’s no other Alternate groups yet),
— to ‘C’hange inventory item ID 979581 (the lot for the 4x 92280) to add the
‘1’ MID so the two lots are paired.