Not sure if this belongs here or needs a new thread or maybe there's another thread in existence but....
Did an SPG Plat Challenge at the start of 2018. Completed in April, SPG Plat was showing through the end of 2019.
Combined accounts, and Marriott Plat also showing.
Post merger, only went across as Plat, not Plat Prem which is what I was expecting, and my end date was pulled back a year (i.e. only valid for this year).
I have hit the 50 nights in 2018 anyway, but I was expecting Plat Prem through 2019 as a result of my status challenge and being SPG/Marriott Plat prior to August. Have I misunderstood?