Operation Order for Phantoms

We have 2 phantom subassemblies after the same operation that are created by the configurator. We are trying to control the order that the added operations are in, but can’t figure out how the system is ordering them. We tried reversing the sort order of the features, reversing the actual feature line numbers, changing the alphabetic order of the feature labels, even reversing the alphabetic order of the work centers. Does anyone know how the system determines the order of these added phantom subassemblies?