User blog comment:Xaero Dumort/BioWare finally broke my good spirits./@comment-737801-20120518231954/@comment-24.76.93.205-20120523220739

They may not have been planning on the player backlas, so put the Extended Cut as priority numero uno for SP, thus requiring them to record/program new everything. I believe that normally, DLC's are planned in advance, so they can record for them, but not in this case.