It has been that way for awhile and different staterooms are offered on each option. For example I am booked on a B2B Alaska which can also be booked as one 14 day cruise. If you try to book the 14 day no suites are available but a few are available on the 7 days. And even when I booked a year ago the suite options were different on each cruise option. I could not get an aft suite I liked as a 14 but could on the 2 7 day cruises. Also in a suite that means I get 2 free specialty dinners and up to 4 mini bars