Maybe he wanted to see if he could do even better? That's not a bad thing. Flagging the score because he got a 25 after getting a 27 is just stupid. I'd imagine that's an extremely common occurrence so no idea why that would be flagged.I think the question is for what purpose? If he scored a 27, he would have qualified as long as the GPA was 2.3. Getting a better score has no benefit to him, that score gets him into UNL, he isn't competing or an academic scholarship, so there is not a need for a higher score there.
IF he scored a 27 and someone told him to retake, and IF getting a 25 is what got him flagged, he got bad advice. IMHO