@hime
News from TPTB.
My "echo" ability counts as sort of "an extra shot". So it wouldn't use one of your own usage shots. Nor would you be aware that I had "echoed" you (presumably unless you noticed the effects lingering. For example, when I targeted Crying on N1, I was concerned that Naomi/Melkor would still be UwU-ing on Day 3 because of the "echo")
So either Crying destroyed my ability when I targeted him, or the "less chance of success" kicked in both times, or the actions that you each performed "next" were less repeatable.