It appears to be an accident like others have mentioned.

How many times have you had to send an entree back because it wasn't the way you ordered/expected it to be? Under-done, over-done, 'wrong food', sauces added when requested on the side? Do you ask for an investigation from the head office for each occurrence?

Olive Garden made it right and gave the customer $40 in addition. Yes, there was the inconvenience of having to go back and get the corrected order, but that is what the $40 gift card was for.