I've deleted the other thread since the question belongs here, on the dining plan board.
I've copied my answer in the now-deleted thread to this one because they were answering the OP's direct follow-up questions and had a few caveats.
From the other thread:
As the PP said, if an item is listed as "for two" on the menu, it will require that two individuals use the dining plan to order it. So if you wanted the Yachtsman's Ribeye For Two, both you and your DH will have to order it.
You mentioned T-Rex, which is known for being kind of inconsistent regarding the larger items. For the Volcano dessert, I've read reports of everyone at the table needing to pool their credits to order it (usually, it requires 3 or more adults on the
DDP/DxDP to order it). I don't know how they deal with the multi-person appetizers, so I would be sure to ask before you order them.
Follow-Up:
Under most circumstances, the use of a DxDP credit entitles the diner to one appetizer, one entree, one dessert, and one non-specialty/non-alcoholic drink per person using the plan at each meal. So under most circumstances, you get to order what you want and your DH gets to order what he wants. Some venues cost 1 credit per person and the Signatures, dinner shows, and packages often cost 2 credits per person.
A few restaurants have items listed as "for two" which means both you and your DH have to agree and order it. So at Yachtsman, the Porthouse would have to be both your entree and your DH's entree and would "cost" 4 credits. If you did this, you would get two appetizers, one Porterhouse entree, two desserts and two drinks brought to your table. If you wanted separate entrees, you would have to pay OOP for one of them. You might look into the prices to see if it would be more economical to pay OOP for the Porthouse and then use the DxDP credits on the second entree (although, then you would only get one appetizer, one dessert, and one drink covered by the plan).
At CA Grill, the sushi does count as an appetizer. In the past (pre-refurb) there were a few restrictions on the sushi (not all were considered appetizers), but I don't know if that is still the case.