Hello Dakadin - I've also noticed that if I copy a NPC, unlock it and adjust the initiative value (setting the attack quickness box to blank Attachment 44945 and inserting my own value), my inserted value doesn't stay in the box. It either blanks it or becomes one of the RM standard speeds (BF, Slow etc).
I use the RMC 1 (amended by RMC 4) initiative system based on Qu stat and racial bonuses, so would like to adjust the Qu values for NPCs (this could be done as Wolf_Shield references it in one of his tutorial).
Thanks and let me add my appreciation to all the work you put into this system.