[COLOR=#333333]BOLTING/STUD_2Nuts_HH_2Washers/0.50:A[/COLOR]
[COLOR=#333333]BOLTING/STUD_2Nuts_HH_2Washers/0.50:B
[/COLOR]
[COLOR=#333333]BOLTING/A/STUD_2Nuts_HH_2Washers/0.50[/COLOR]
[COLOR=#333333]BOLTING/B/STUD_2Nuts_HH_2Washers/0.50[/COLOR]
[COLOR=#333333]BOLTING/A-STUD_2Nuts_HH_2Washers/0.50[/COLOR]
[COLOR=#333333]BOLTING/B-STUD_2Nuts_HH_2Washers/0.50[/COLOR]
The reason is that the :A and :B are stripped off when summing the components. This results in the same "stripped down" SPCO name but the description is taken from the first of the components encountered.