I crafted an item for my knives apprentice quest and it dissapeared. It's not in my bank nor my backpack. It took me some time to collect all of the items to make the item and its frustrating to have to do it all again. Can anyone tell me why or how this happen and how to avoid it in the future?
Chances are they were in your backpack when you went selling and was not paying attention to what you were selling. Not a big deal, just go to the bazaar and buy them back.
However, if you crafted those items and ran to the crafting teacher to turn in the quest, then they are gone because the teacher took them.