I went to apply 2 , +5% Blessing Dusts to an Overload rune that was in a chest. The dusts did not apply the success increase, yet they were consumed. I thought something messed up so I tested it again with a 1% with the same result. I moved the rune into my inventory and applied a +4% with success. I've never heard anyone complain of this happening before, so I was unaware that this could even happen.