Front door frame increasingly out of square
This could be a case where your home has been built on soil that moves with changes in moisture content, such as an area with expansive soil. There are expensive and intrusive methods for reducing the effects of soil expansion, but you can't really eliminate it. 

A 2 year old house should still be under a warranty of some sort, I would procure blueprints and foundation details from the builder and call a home foundation specialist to ensure that the underlying structures were built appropriate to the soil type.