each time you shut off clears ecm monitors

I have a 1500 i bought it approximately two weeks ago. i have put around 500 miles on it and 4 emission cycles are still incomplete the catalyst system has said ready after driving around 40 miles in one trip. but then when i shut the truck off take the key out and let it sit until the next day. i checked it again and it is back to being not ready along with the other 3 cycles that are not ready the other 3 are o2 sensor, heated o2, and evap. My key cylinder is tricky too to get the key to turn i have to jiggle the key quite a bit to be able to start it is there a possibility that the ignition is to blame or is there some other issue possibly wrong its as if when i shut the truck off it acts as if i am disconnecting the battery but everything else works truck runs just fine shifts good etc. any help or advice would be appreciated
Thank you