Back to Back cruises and loyalty perks

[WannaCruise365]

I am looking to book a b2b cruise and familiar with Princess but not with MSC. If you book two 7 day cruise as one 14 day do you get perks for each 7 day cruise? If you book b2b separately as two 7 cruises would you get perks each 7 day segment? On Princess you get loyalty perks both cruises regardless of how you book them. Thank you 😊 

[Beamafar]

If you book a B2B, they're treated as separate cruises for perks;  if you book as a 14 night it's treated as just one cruise, not as 2 one week cruises together.  We have this situation coming up in a couple of weeks where we booked as one 23 night cruise, though MSC has also sold the itinerary as 2 separate sailings of 10 nights and 13 nights.  Unfortunately we will only get one lot of perks.