Not sure if bug or intented but I noticed some decor on vendors dont have the +10 on them even though I still haven’t collected them. For example Stormsong Valley Caspian, half of the items were missing it. All were uncommon quality.
EDIT: False alarm! Turns out those were items that I had already earned. But it doesn’t specify that on the item, like when you buy it from a vendor first time that if its placed or in storage, unless you either preview it or buy it again. So more of a UI issue, hope this get updated since on first glance it’s not really obvious.