I called the Owner Modification number and the woman there said only the resort itself could answer that question. They just said it would be on the deed if it had that provision. The owner did send me a copy of the deed but again being new to this I am not sure how to really read the deed.
That's a ridiculous answer.
You shouldn't be left in the position of calling repeatedly to get someone who knows what they're doing, when you don't have enough information to know when that's happening!
Ask the owner how the Week is indicated in his/her owners.marriottvacationclub.com account. In my account the details for my UO-affected Weeks show them as
"View: Oceanside/Gardenview" (meaning an Oceanside ownership with a Gardenview Unit Number attached to the deed) and
"View: Oceanvista/Gardenview" (meaning an Oceanvista ownership with a Gardenview Unit Number attached to the deed.)
If the owner needs help finding the info you can tell him/her to sign in and click on, "Vacation Club Portfolio" under "Managing Your Ownership" in the column on the right, then scroll down to the "Ownership Details" line of the Week in question. If two views are indicated the ownership will be the first of the two; if only one is indicated then of course the ownership is obvious.
The first pages of my original deeds also reference the UO information but I'm hesitant to tell you to rely on what you've received from the owner because it's unknown whether s/he was the original owner, thus unknown whether subsequent deeds/transfers reference UO.
Even with all that I would still want confirmation from someone at Owner Modifications who understands what UO is and why confirmation of whether it's in play needs to come from that office. But see if the owner is willing to check his/her account first, before you go off on another wild goose chase. Good luck!