I think I may have been wrong, the card does show up at first. At least it does now, kinda. This is what happens:
I open the deck, go to make hand, it all works fine until the browser crashes(? I'm not a very technical person, my ipad just tells me the site had to be realoaded because problems) and it then loads the old version. At least I think, bc:
-cards from new version of the deck no longer show up, cards from old versions do.
-the cards in the deck are no longer from the sets I later changed them to.
-my precious 1 star is gone
-if I then go to overview, it shows an old version.
When I then go to all my decks and open this one again it's back to its current version.
I've done that little loop a couple more times to be sure, and I think thats pretty much it.