We have 5 Royal Caribbean cruises booked from Oct., 2021 (currently Platinum) through Oct., 2022.   With the double points program, we should be Diamond for our last cruise in Oct., 2022.  If I'm booking now as Platinum, am I losing out on upgraded benefits for any cruises I book going forward? (We'll be Emerald after our Nov. 2021 cruise) Or should we wait until we're Diamond to book add'l cruises and get better booking privileges?  We wanted to book additional cruises but thought we should inq