Please see the homeowner maintenance guide for care of your HardiePlank siding. Siding may expand and contract with changing weather conditions and temperature.
Stain follows the grain of natural wood, and as such will have variations in color and conformity. This is an expected result and adds to the beauty of the product. There is no guarantee that each piece of stained product will exactly match another, or exactly match a sample provided as you were choosing your home options.