How can Tommy be an alpha werewolf?
In the Big Wolf mythos, what an alpha werewolf is precisely has never been elaborated. Typically in werewolf mythology, an alpha werewolf is an individual transformed into by sorcery, birth, or curse. Beta werewolves are those werewolves who carry the tainted blood of an alpha. Tommy was bitten, so unless there was more to the attack on Tommy by Mr. Dunleavy, the typical idea of alpha/beta werewolves can be tossed aside. Another ‘inconsistency’ is that an alpha supposedly cannot attack a beta of his own bloodline without inflicting pain upon himself, but Mr. Dunleavy had no qualms about attacking Tommy. That’s a pretty stupid concept anyway, so it’s probably best ignored.