still no help from them...after a few years I shall have known better already. anyway, today I had little extra time so I decided to handle this myself, again...
I open up setting files and make a copy of all fleshoffering codes then replace fleshoffering with boneoffering and all necessary tidy-ups, guess what? bot now cast boneoffering just like fleshoffering. I let them get away with their lazyness again this time. I dont know why I kept paying them for...