I don't know if it is the case but it seems some chain of events lock the harem. For presonal exemple, I begin the chain Cassidy and Dwayne before the band and home harems and once I finished it they both activate on first try (for the first half of band harem I am still locked adding Sasha). Hoping it helps you !I've found out I cannot activate neither home harem, nor band one in the latest update.