Not sure how you get that from what I've read. He's taking visits in the Spring which means multiple schools will be in play. Those 2 schools may lead now but with him waiting until Spring that will change.
Just a gut feel and based on the fact that Prohm is talking to him several times per week, and the PT situation at ISU will look extremely compatible for a juco.
If he visits in Sept and still wants to wait until Spring to commit, then clearly it's not looking good. But time tables for committing change all the time, so I wouldn't rule out a fall commitment if he's serious with ISU.