Yes, it looks like Miami moved from 71 to 60 for the 2011 rankings. That makes it a high T-2 (schools ranked 51-100). It may indicate an upward trend with the school that has been going on for awhile. (Or this school may move back and forth through the rankings. Like Stetson for example, which used to be T-2 a couple years ago and is now T-3.) However, UF and FSU are much cheaper (half the price of Miami) and are more respected in FL. I'm not sure where your son wants to practice when he graduates, but the schools with the biggest clout where he wants to work would open the most doors. However, there is also the factor of where your son feels like he would best be able to spend 3 very stressful/intense study packed years (in terms of the feel of the school and a little bit about the area). If he feels like Stetson is the best for him or Miami, then that is an important consideration. Of course, there are a number of other factors to consider beyond these discussed that may influence the choice.
While the rankings are questionable, they are also important in terms of which schools fall into the breakdowns of T-1, T-2, T-3, and T-4. It is much harder for grads of T-3/4 schools to find jobs after graduation and will likely limit what types of jobs they can get. Maybe rank shouldn't matter, but it does.
I just saw your comment about him not being able to get into FSU or UF. They are very hard to get into. From my own experience, I didn't make it into FSU for my 1L year, but I have been accepted to transfer to it for 2L. I wouldn't recommend this route for others because it is based on 1L rank, which can't really be predicted prior to entering LS. If your son can get into Miami, but not FSU or UF, it is the next best in the state. After Miami is Stetson. Stetson, while now T-3, is much more respected than the T-4s in FL.