Back in HD 2.0, it was almost unheard of having more than 1 ineligible show up on campus in D1/D2 (D3 they are eligible to play immediately anyway). If you signed more than 1, almost 100% chance you had all the others not show up.
Now in HD 3.0, I've seen multiple instances where more than 1 signed ineligible shows up (I have not yet had an ineligible NOT show up). Last recruiting session I had two freshman ineligibles sign and show up.
I wouldn't doubt that whatever Seble did in HD 3.0 signing logic, he lifted any restriction there was and it would likely be possible to sign any number of ineligibles.