I have experienced some very odd events with my crystal bag. When I take a crystal out it stays??? That is I have the crystal I took out of the bag plus an extra one in the bag. When I take them both out I can also sell them. I also tject whether there was a resistance bonus for both of them and yes there are. But obviously I cannot put two crystals into the same slot so when I exchange the two for one higher level I actually loose resistance. Is the bag supposed to generate new crystals or is this a bug???