Greetings from Portland, OR!
I'm a little unclear on your problem, but it sounds like you are trying to use the Audi charger to do a Level 1 charge? I had to do that for a week with my car before my 240V outlet was installed. I also had problems. What I found was that when I would set things up and plug in the car the Charger unit would would set to "50%" and the car would tell me it was waiting for a timer (rapid flashing green light at the port). I found I had to press and hold the power switch on the charger box until it switched from 50% to 100%. Then the car would charge (slow pulsing green light). The Power button is really a two-function button--on/off and 50/100%. (The presented voltage at 50%/120V is too low to charge the car and fools the car into thinking there is an active timer.) I don't know if that is relevant to your problem, but it was very annoying for me!
Locking or unlocking the car by itself should not stop the charging. I pretty much always charge my car while it is unlocked, and have locked and unlocked it while charging without interruption. When you insert the charging head into the receptacle, a locking pin in the charging port inserts into the charging head to hold it in place. While the car is charging, if you press the little black button by the charging port (the same one that opens and closes the port), the charging stops (while light comes on) and the pin retracts, so that you can remove the head. Locking the car door deactivates the black button so that the charging head cannot be disconnected (pin stays inserted)--or the charging status be changed--until you unlock the car (eg, so that at a public station someone cannot remove your cable if you are not there). So, you do have to have the car unlocked before you can remove the charging head, but just locking/unlocking the car will not stop the charging. Only pressing the black button will do that. You might want to check to see if the charging box is set to 100%; if not, press and hold the power button until it switches to 100%
...and congratulations on your car!