Look at the missions. There should be ones that create plain +1. They're the missions that only need leather, the lower item, and residuum. No extra mats.
Glad someone started this thread. I also completed Protect a Caravan about a total of 11 times across 4 toons yesterday and got none of the rough astral diamonds that should have been on the toons' inventories. Completed three of the same in game and received the ADs just fine