Is it possible that you forgot to grab atmas and just assumed you did? I have done this before, and the outcome was much like what you are describing.
I prolly would have somewhat easily ran out of mp on whm doing a glavoid when I used last atma config after playing dancer (thank you SE for temp items) so I can see how this would happen myself. =)
I remember seeing somewhere SE saying they were gonna do some changes on cure spells, but I didn't understand/bother with it. Yesterday I was doing Dragua and I almost ran out of MP because of all the curing... I even pulled hate off a Vere MNK.
What happened? Did they nerf cures or I'm just crazy? Usually I could heal a MNK back to full HP in just one Cure VI but that didn't seem to happen yesterday...