Cielo is too fast, Dante could barely see him much less jump on him. Plus he's just as liable to jump on one of the Cielo-Athos Clones, he's kinda dumb like that. In fact, He could even mistakenly jump on Cielo-Athos, who could revert back to Athos causing Dante to tumble off and then transform again.
--
You beat yourself up with your past. Don't blame yourself, blame the world. Blame God. Blame me.