Question about Aspect of Ancestral Echoes

I have 100% Lucky Hit Chance on my Upheaval and the aspect on a 2h giving me 118% chance to summon but even while spamming the ability I summon 1 echo. Is there a hidden cd on this aspect? I was pretty excited to do some spell echo upheavals but it just doesn’t work?

echo can be summoned once per skill use. Also there is a mystery for me how lucky hit can be 100%+. There is a lucky hit trigger probability by skill, let’s say 50% by upheaval, and effect probability, let’s say echo summon with 50%, so with 50% chance you will trigger lucky hit wich with 50% chance will trigger ancestral echo. In short - 25% chance.
But how to understand 100%+ lucky hit? 50% chance of lucky hit with 118% chance of the ancestral echo? Always have been sure that highest probability of happening is 100%.

There is a hidden 4s cooldown. It’s stupid. I wanted to do an ancestral warrior build using this, charge one, and call of the ancients but nope…