They will be having two different eastern Caribbean itineraries on the Solstice. One will be the one that Paul is one (San Juan, St. Marteen, and St. Kitts) the other will be (San Juan, St. Marteen, Tortola, and Labadee). So they are probably sailing on the cruise that visits Tortola.
And if disembarkation was as easy as it was last week there should be no problem. It was the first ship I have been on where they were done ahead of schedule. We were the last group to disembark (10:45 AM) and we were off the ship by 9:30 AM.