No need to surround the methods in array. Simply use:
after_create :do_this, :and_then_this
Bonus Information:
If a before_* callback returns false, all the later callbacks and the associated action are cancelled. If an after_* callback returns false, all the later callbacks are cancelled. Callbacks are generally run in the order they are defined, with the exception of callbacks defined as methods on the model, which are called last.