SOME people, not all, have been able to make the reservations for each following day after the 10th when they are within 90+10 for that date.
If my math is right, your first 10 days are December 15-24 and your ADR date is September 16. (BTW the 25-29 are 5 additional days, are you staying for 15 days instead of 14?)
You MAY be able to call on September 17 for December 25, the 18th for the 26th, 19th for the 27th, 20th for the 28th, and 21st for the 29th.
OR you may have to wait until 9/26 for the 25th, 9/27 for 12/26, 9/28 for 12/27, 9/29 for 12/28, and 9/30 for 12/29.
There doesn't seem to be a clear answer--everyone who calls gets told one of the above answers, and every CM swears up and down that THEIR answer is correct and the people who do it the other way are COMPLETELY WRONG. So you never know.