I was told the transfer case is leaking and rear case not turning. Do I have two transfer cases?

No, you have a transfer unit that provides the drive to the driveshaft that powers the rear wheels for this all wheel drive vehicle. Just one transfer case is present. A leak is one thing - resolvable from resealing or a part replacement. But what is more concerning is this "rear case not turning" - this requires further evaluation to find out what is happening. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops