No, this is an App error. You are on 2 different ships and it should be 2 separate bookings on the App also.
This is called a S2S (side 2 side).
Only, a true b2b, same ship) would be
combined on the App.
Call Princess line and follow prompts till you get an ocean ready rep. They need to fix it. Tell them you want to reserve dining, excursions, wifi, etc on the App. If you have a TA/CVP ask them for help.
Yes, this has happened to others, as they have reported on here.
Let us know.