I have a SMN glitch that other people seem to have.

One is the SMN 2 hour. I know what it's designed to do for Alexander and Odin, but my problem is with the rest of the avatars. It's still up for 3 minutes, but no matter what I do, I seem to be able to only use Diamond Dust on Shiva or whatever, only once. When the Blood Rage timer is up and I try to use Diamond Dust again, Shiva acts like she's preparing to use it and then nothing happens. I've tried putting her away and bringing her back out; making sure I have a mob targeted; I've tried everything I can think of. Is this the way the SMN 2 hour ability is now supposed to behave?