Om Shanti
ShivBaba narrated Gyan Murlis (flute of knowledge) through Brahma Baba and is now clarifying the true meaning of those Murlis (the true Gita), the advanced knowledge, to the Prajapita Brahma Kumar/Kumaris (i.e. Advance Party). The Advance Party and the Brahma Kumaris Organization (BKWSU) form the two halves of the alokik (other-worldly) Brahmin family who will eventually re-unite to transform this hell into heaven.
It's about who is God, the true story of the World Drama and who plays the hero part in the World Drama.
If you wish to investigate further you can read/see/hear what Baba (VVD) says. You can then decide if you think it is ShivBaba: presumably just as you decided that the Murli that came through Dada Lekhraj was ShivBaba.
More or less all of the Murli clarifications are now avaliable on http://www.PBKs.info in video and audio (mp3) format and also a few are there in written form.
PBK Jim