Final answer:
The builder did not install the door frame correctly at a right angle. The door frame needs to be adjusted or installed correctly to ensure that the door can close properly.
Step-by-step explanation:
The door frame measurement provided in the picture indicates that the builder did not install the door frame correctly at a right angle. In order for a door to latch properly, the door frame needs to be at a right angle. If the door frame is tilted, as you described, it can impact the door's ability to close correctly and latch.
One possible explanation for the door frame appearing to be a right angle even though it is tilted is an optical illusion. Optical illusions can distort the perception of angles and make things appear different than they actually are.
If your door frame is slightly tilted, you may need to adjust the frame or consult a professional to ensure that it is installed correctly and can close properly.