Nothing to worry about: if the cloves haven't developed properly it's because those bulbs didn't get enough chill weather. They were probably in the part of the patch that got the most Sun: garlic bulbs need at least 30 nights below 10°C/50F to develop properly, otherwise they will either develop like you saw or will get a big onion-like garlic with no cloves.
The trick is generally to plant early (to get as many chilly nights as possible): if the ground is not frozen late December/early January is usually the best time to plant garlic.