R30812 Cost Simulation Doubles up X Cost Types

When we simulate costs with single level rollup, it doubles up the item's X factors.
For example, item# 100 (Stocking Type M) has component# 200 (stocking Type M). If I simulate 2 items together, it works fine: however, if I select only the item# 100 and simulate it, it doubles up its X1 and X2 cost types. Can anyone help me? Does anyone have documentation on Simulation of X cost type?
Thanks.

.Stacy

I'm having the same issue. Was this ever resolved? X cost types only

the resolution was a processing option in R31802 to clear all items and recalculate ONLY manufactured items. Sorry for the late update.