It seems that SS may be testing (or transitioning to) a new way of pricing a cruise on their website. First, they have you click through various choices such as number of passengers and your choice of their three pricing option (DtoD, DtoD without flights or Port to Port) Then you are presented with a choice of suites that are shown as "Total Price" rather than per person. The link below should take you to an example for the July 4, 2024 Spirit cruise Reykjavik to Reykjavik.
https://quote.silversea.com/v3/SL240704010?guests=A2-K0&airfare=DoorToDoor-flights--Economy&gateway=DoorToDoor-flights--ABQ
Interesting way of showing pricing for various options. Will be watching to see if this will be a change for all cruises.