There is no contradiction. First of all he does not remember some things, ok here nobody doubts it. But I also remind you they sent him all the scenes of the 13th volume on Twitter, in Japanese, of the original work. Therefore, re-reading the last part, he confirmed the omnipotence situation. He didn't say it so casually. Then the question of feat exists, since the author said that for the ritual and to access the anti-universe etc, tloi requires another person, another person is needed (Akuto Sai). In fact, he declared that Tloi is not omnipotent for this very reason, everything is logical, not contradiction. In fact Akuto Sai before the ritual even said if I'm not mistaken, that the Void Body exceeds the 0! Besides, the place where they will go is not totally NFL, but rather he clearly tells you what he will have. Besides, I remind you that the anti-universe is annihilated and converted. The feats are there and how, you just have to reread carefully. Also the author is not as careless as you think, many things he saw as right following the old line of thinking of him. Besides, now he also wants to start re-reading the series.