David Lynch's magical mystery tour across Sierra Bonita West Courtyard

(1) Betty and Rita entering SB West-Courtyard by the door of that bungalow opposite #12
Flaw: How did they get there in the first place? There's no passage nearby.

(2) They're heading right. Notice the stone pillar A.

(3) Next they hit at the main walkway. There's a gate in the back beyond which we can see cars passing. Betty is looking in straight angle at #12.
Flaw: She doesn't recognize the number sign that is clearly readable. See (10)

(4) Both turn left and head down the walkway. Note: There sits an orange bulb in that socket of pillar B.

(5) They're passing by this door. While Betty and Rita are seen walking downwards, the camera movement is incorrespondingly upwards. 

(6) A look back where they came from.

Flaw: Pillar A of (2) is gone. We now see it covered by a mysterious bush. Likely a replaced requisite.

(7) The girls get to and turn around at the bungalow opposite #17. Compare its mirrored front shape with (17)

Flaw: There's no number sign attached to the wooden column as it has #17. Reason: Apt #s at Sierra Bonita are originally displayed this way.

(8) We are thrown over across the courtyard - suddenly bungalow #12 comes into sight.

(9) So Betty and Rita have found number #12. Did they really?
Flaw: No, to our surprise we see them now facing #17. Compare to (16)

(10) We are back at the real location. From her viewpoint Rita can easily read the number sign as could have Betty from angle (3).

(11) Behind Rita we see the doorway of that bungalow, where both "sightlessly" started out their quest for #12. 

(12) "She's in 17. That's down at the end on the left." A correct description - Betty and Rita leave #12 with mixed emotions.
Flaw: This time the stone pillar B behind Betty is missing the bulb. Compare to (4). Possible reason: Shots from different sessions.

(13) Our couple is moving down the walkway towards #17.
A particular bungalow attracts their attention.

(14) It looks abandoned but the door light is still switched on.
Flaw: This shot is a retake of that bungalow seen in (5). This time it appears on the right longitudinal path.

(15) A few more steps before they reach #17...

...at last.

(16) "This is the apartment."
Actually they stop at the same spot they found #12.
Compare with (9)

(17) Betty tries the door. But hold on - isn't there something wrong with the frontside compared to what we have seen  two seconds ago in (15)? Try to spot at least three differences...

(18) Well, seconds turned months. Even the tall bush to the left (15) is suddenly defoliated – probably again due to a mash-up of different sessions. - END -