Things take years to twist out of shape and when you level the house you make sure the floor is level and weight for gravity to help put the house back where it belongs. Mark the cracks at the ends so you can see if they are still growing. Don't repair the cracks until it is finished moving.
Make use of the warranty you have for the repair work that was done. Unless the fine print says "Good For 30 Days Only", you might get your contractor to look things over and make repairs again, at no cost to you.