Can't change order of soundsets in campaigns

I’m no longer a Syrinscape subscriber, but I own a lot of soundsets. However, when I try to change the order of them in my campaign, drag and drop isn’t working. I also can’t remove soundsets that I don’t actually own. I can add soundsets just fine - they appear at the bottom of the list, but I can’t change the order with those either. I’ve used both Chrome and Firefox to no avail. Is there something obvious I’m missing here? Thanks!