Do you have any more info, name or variety of the cherry? Not unusual for trees do do nothng for first few years depending on the original planting size as their root systems can take this time to properly establish. There are so many cherry hybrids and varieties it is difficult to say. Some are very poor vigour or do not seed true to form ( the parent seed does not develop into a true copy of the parent plant) and can be grafted or budded. Basically the top of the tree retains the desirable characteristics you want, flowers or fruit, and the root stock is better suited to ground conditions or climate. The trouble with budding or grafting is that the tree can 'revert' to the root stock characteristics so the top or part of the top displays the characterisitcs of the root type. If a tree is on a vigourous root stock, for example wild cherry, then what you are seeing could be the original wild cherry. That grows fast and can get to over 100 feet; a beautiful tree in the right place! Not saying this is the case here without further info but it could explain things?