One more important clause I just noticed:
Earn 5%, cash back rewards on the first $500 charged to the card each billing cycle on combined purchases of gasoline and groceries. For purchases in these categories that exceed the $500 monthly limit, you can continue to earn the 1% cash back reward.
That's barely more than 1 fill-up and 1 good trip to grocery for our large family.
That's still pretty good. Why don't you switch to another card after you reach the quota?