Ya know, I dont know about you, but I asked the question about 'what needs to be disclosed' when it came to being punished for academic or behavioral infractions at University for infractions that got 'shelved' before they made it to student court, and arent on my transcripts, but might be still on paper somewhere. The advice I got, though I cant verify its veracity, seems sound.
'If it happened, tell them about it, especially if you didnt get caught cheating or doing something VASTLY wrong. But if they find out about it later for WHATEVER reason, even if its no big deal, and they can show any irregularity in your disclosure, you can be denied entrance to the bar, or booted from it. Odds of it happening are ultra slim, but it has been known to happen'
So I disclosed everything. Even stupid stuff like getting written up for having girls in my room after hours... Hey if the question is 'were you ever disciplined'.... a write up is disciplinary action... plus, I personally would not want to be in the position of having to argue... 'they didnt specifically ask me if I got written up, and that it was let go because no second offense occurred within a year...
Having already made the statements, the problem you have is you are on record revealing your expunged record to some schools and not others, which makes it easier to find. I think you need to more advice than I can provide. But if you want my opinion, I wouldn't invest 150k in going to law school unless EVERYTHING was on the table... the stakes are too high.