Leo did not say anything to Alice. It wasn't that he was ignoring her but the countless calculations in his head made it impossible to respond to her without giving her the wrong answer.
He was trying to figure out who that bastard behind his system's new development was.
As far as he was concerned, he created the system motherboard on his own, using his own spirit energy, and backed up the power inputs from his constellation siblings.
But though their powers were shoved into the system, they had no power to control it, so it was neither of them.
For someone to be able to make an audit, they had to have the same thinking as him, and their spirit energy needed to be similar.
And as far as he was concerned, the only one similar to him in all that was 'him', his twin. But there was no way he would've been able to make the audit where he was and what exactly would he gain from giving Alice an extra stat that could potentially destroy him?