Shapechange: The character can shapechange into one specific type of normal animal once per day per level of experience. While in animal form, the character has the movement, armor class, attacks, damage, and powers of the animal. He retains his normal Hit Dice, hit points, attack throws, and saving throws.
Grammatically this tells me that for each level you can choose a normal animal at first level and shapechange into it. At second level you can choose a second normal animal and change into that animal once per day and the first animal once per day. Is this correct or did Alex mean to word it as follows:
The character can shapechange into one specific type of normal animal. He may do so once per day per level of experience.