Looks like y'all are going to be there in early-mid June?
The CRT window for your trip opened at 180 days (in your case December, which I am sure you already knew).
Unhappily, it is likely that they will not have any openings left other than at the 'odd' time you were offered. CRT is, after all, one of the most-coveted bookings on property. Adding a person meant you had to 'give up' your previously set table and 'reserve' a new (and possibly larger) one.
There is no future window for CRT that will be opening for your trip. Your 'regular' window will open in March.
The only advice is, keep calling periodically and hopefully someone else with a party the same size as yours will cancel and you can pick up their spot at a more convenient time slot.

Here's hoping!