Actual Cost Component Split

Hi Experts,

In his experience, the actual cost component split, works well at level of Fixed and Variable costs?

what settings and recommendations ensure that this functionality works well.

1. In my case, when I registered the beginning balance of Finished Good before Go Live, this balance didn't have Cost Component Split.

Is there some way to modify manually the costo component split?

2. Other case occurs me (see image attached), in Receipts line (CKM3N) there is a line calls Transfer posting - special stock, and in Consumption line, there is a line calls Transfer posting - special stock, too.  This is affecting my analysis of Cost Component Split.  Is there some way to avoid those lines?

Regards,

José Luis