Placeholder Question

My family of 6 bought 2 placeholders for a future cruise since we will need 2 rooms again. I see all the post about sale prices and just wanted to view some dates and see how much it would cost my family. I go under my reservations and see the two placeholders, but I don’t see any option to see the discount with the placeholder.

I used Costco for my first cruise and it looks like it put that as my travel agent for this new cruise. Is that the problem? Am I going to need to call Costco every time I want to find out a price? If so, would I be able to remove them as my travel agent for the time being and possibly add them again later if I go that route?

Sorry if this is confusing, I just like to view the different dates and price compare on my own before presenting my travel dreams to my husband 🤪