My form is showing "less than half-time student even though "at least half-time box is checked, why?

You can't claim both the American Opportunity Tax Credit and the Lifetime Learning Credit for the same student. So you can’t get credit for your community college expenses. 

If you enter two 1098-Ts for both schools, one with half time checked and the other with half time not checked, you will get a follow screen that asks "Was the student's status for 2024 half time or more". Be sure to answer yes, even if that screen comes up after entering the Community College 1098-T.  The question means was he half time or more any time during the year and is not specific to the CC. 

Both tuition amounts will count for the one American Opportunity Credit.