Patt wrote:

The lock has a key to open it from the exterior and a thumbturn to lock it
from the interior. Isn't the thumbturn supposed to be at the twelve oclock
position (straight up and down) when unlocked and in the across position
when locked? This one is the opposite of that. How do you change it around
so the thumbturn is in the proper position.

Rotate the door 90 degrees.

Nick