EA App changed my Sims 2 Ultimate Collection to Sims 2 Double Deluxe

Ultimate Collection and Double Deluxe are obviously not the same, as we know. I think the OP is asking if UC on EA App is indeed UC because it has the cover of DD.

I don't know if attempting to download that thing results in installing UC or DD. My EA App recognizes my UC with that wrong DD cover, but with the correct product key (the key I used for UC).

Try and download the game. I guess it should create a folder in the name of UC, instead of DD.