When crafting work orders using the CraftQueue,
if you happen to click the "Next:..." button repeatedly to fill a bunch of orders,
You seldom end up getting some items crafted as private items.

Just happened to me with my Scribe performing a bunch of Treatise for my alts.
I ended up with a collection of useless treatise in my inventory :(

Perhaps disabling the button until it's done with its current task would prevent this?