The staff WAS lenient. After finding out about a visit, he denied taking the visit. The coaches said OK, but don't do another visit without telling us.... and then he went on another visit.... and then he denied taking a visit again. To me, that sounds like either bad decisions (to not tell and then go on a visit and then deny you went on a visit) or he has character issues.
Here's an analogy: You just proposed to your girlfriend (Iowa offers). She accepts your proposal (Eno verballed) and then decides she wants to go see another guy (Eno visits another school) and doesn't tell you. When you find out about it, you confront her with facts and she denies she ever was out with that guy. You decide to let one slide. She then goes out with yet another guy without telling you... and then she denies she was ever out with any other guy, even though there is proof that she was out. Do you still trust her or do you break off the engagement? Personally, I'd break off the engagement; apparently you'd let that slide also.