Delay on certain skills?

[Bixby]

There' sno delay w/ the animatin. The skills aren't even being used when I press the assigned button.

Are you using the skills straight out of the spell book, or through macros? If you're using macros, they can't/won't queue up early the way regular abilities from the spellbook will. (You can activate an ability about half a second early, and it will fire as soon as it's available; not so with macros.) So there's always going to be <your latency + your button spamming speed> delay between an ability in a macro becoming available and the macro actually firing.