MissingUpstate

We are sailing from Vancouver and terminating in Seward. However we just received an email from Royal Caribbean that states we need to fill out an additional form on the Arrive Can app because we are starting and ending in Vancouver.(We are not) The email says that we are supposed to fill out one form because we are flying into Canada and then another form for arrival into Canada by boat. I am very confused because we are not arriving back into Canada by boat. I called customer service and was told just to ignore the email. I'm not convinced Royal Caribbean knows what is going on. Anyone else recently take a northbound only cruise have any insight?