Why is there a difference in disc count? I see a listing on Amazon with 10 discs, and if it’s the case, I would much rather buy the nice Entire Mystery collection 😁. ( What I found: https://www.amazon.com/dp/B00KDRV83S/ref=cm_sw_r_cp_api_glc_fabc_jey7FbAERFXJ6?_encoding=UTF8&psc=1 )