Um, where did these come from...?

[Vangel-11432]

From here. Thanks Blizzard

1.26 Loot Box Duplicates Issue

Hi everyone, We’ve identified and solved an issue with standard Loot Boxes causing an increased number of duplicates to be granted to players who own pre-existing core cosmetic content. Players who received standard Loot Boxes during this time will be granted (1) additional standard Loot Box for every standard Loot Box received. For example, if you opened 50 Loot Boxes you will be granted an additional 50 Loot Boxes. Thank you to all our players for being patient during this time. Wrecking Ba…