Yes, if you have the dining plan, you can use your TS credits at CRT. And, yes, according to everything I've read, all CRT meals (B, L, & D) now require 2 TS credits.
When you call to make your ADR, if you tell the CM that you have the dining plan, your credit card will not be charged. However, he/she will still take your CC # as a guarantee. If you do not show up for your ADR or fail to cancel at least 48 hours (or 24 hours, I can't remember) prior to your ADR, your CC will be charged. (I also can't remember whether or not your CC is charged $10 per person or the full amount.)
If you do not tell the CM you have the dining plan, your CC will be charged the full amount of CRT at the time of booking. And, even if you have the dining plan, you can have your CC charged anyway which is what we did.
We have the dining plan, but I decided to go ahead & pay in advance & OOP for CRT so that we can have the TS credits for 2 other meals.