Actually, in her defence, Joan isn't too far off in her story regarding her reduced Season 9 episode participation as shown in this video. If you listen Joan says that she walked into the studio at beginning of production of Season 9 expecting to do "15" shows, only to be told that to save the show money, she would only appear in 10 episodes. This makes sense if one takes into account that Dynasty was initially renewed for only 13 episodes for Season 9. Yes, she is not remembering correctly when she says "15" episodes instead of the correct 13 episode count, but the fundamentals are correct if you look at her story within the context of the moment of time she is recounting.
Now, in the newspaper article I found from the Wausau Daily Herald-Friday June 24 1988 recounting Dynasty's renewal for Season 9, what is open for debate is exactly when she found out about her reduced participation in Season 9, and was it due to the studio or did she ask for the reduced episode participation. According to this article in June 1988, when Joan signed her Season 9 contract she herself opted to only appear in half the season's then 13 episode count. Is this true, or studio whitewash?? Joan has always contended that her reduced participation was not her choice, and in interviews David Paulson does say that Joan's reduced participation was needed to save the show much needed production money, so I go with Joan here once again, though I don't agree with her recollection in the video that she walked on set the first day of production and was suddenly ambushed with this information. All this would have to of been negotiated before she ever would of walked on a set.