Continuity mistake: Stitch grabs a cushion from the bench and shreds it. When Lilo comes back from the kitchen, a brand new cushion is magically back on the bench.
Continuity mistake: At the animal shelter, the box on the left has an "In" label that disappears between shots.
Continuity mistake: When Cobra Bubbles shows up at the front door and confronts Nani about quitting her job, Stitch is holding a red book with its spine to his right; it then cuts to another angle facing Mr. Bubbles, and now Stitch is suddenly holding the book the opposite way with white pages to his right, before Stitch throws the book at the social worker's head. (00:41:30)
Continuity mistake: Following the visit from Mr. Bubbles that did not go well at all, when Nani starts to chase after Lilo, just as they enter the kitchen we see the fridge. After Nani catches her sister, when Lilo tells Nani to sell her and buy a rabbit instead, there are more pictures up on the fridge that were not there during the chase. (00:19:55 - 00:21:00)
Continuity mistake: The Aloha Animal Rescue's front door has a doorknob with a backplate (it has a keyhole) as well as an upper deadbolt lock. The backplate and the upper deadbolt vanish and reappear while Nani and Lilo are there. (00:25:30 - 00:26:35)
Continuity mistake: During Nani's job hunt, Lilo's speaker has a brand emblem on its front just as they all enter Mrs. Hasagawa's produce market, but then it vanishes. The "Gilligan" emblem reappears when Lilo hands Stitch the guitar at Kiki's Coffee Hut, and it vanishes again at the beach. (00:42:25 - 00:43:05)
Continuity mistake: When Nani, Lilo, and Stitch arrive at Mrs. Hasagawa's produce market, the parked truck has "Hasegawa" and a hibiscus on its door. The market's name and hibiscus vanish from the door when Stitch spins out of control with the hearing impaired market owner. Then, in the last shot of Stitch and the watermelon atop Mrs. Hasagawa, there's only a faint "Hasagawa" on the door, with an "a" now. Just to add, the market owner is listed in the credits as Mrs. Hasagawa. (00:42:20 - 00:43:00)
Continuity mistake: While Stitch, Nani, and Lilo are standing outside Kara's Electronics, the red TV has a VCR atop it, and the storefront window has two credit card decals at its bottom right corner. When Lilo asks, "What about Stitch?" the VCR is gone and the two decals are missing. Then, after Stitch snarls at the bicycle bell, the VCR is back, and the colors and style of the two decals change, though it reverts to the original way as Lilo shouts, "My friends!" (00:28:40)
Continuity mistake: Lilo shows Stitch her bedroom, and he arranges toys around, with a toy plane facing Lilo and a clock tower with the time 8:10. A shot later, the plane is facing the opposite side, and the time on the clock is now 5:00.
Continuity mistake: When Lilo and Nani bring Stitch home for the first time, the door latch can be seen on the door, but it disappears in the next shot, and the type of back plate on the exterior side of the door changes. (00:35:17)
Continuity mistake: When Nani sees the pot smoking on the stove, there is a shelf on the wall with four hooks on it. Two shots later, there are suddenly six hooks on the shelf, then it goes back to four hooks two more shots later. (00:17:46)
Continuity mistake: When the girls slip on the water during the dance class, Mertle's panties are pink, but they change to white in the next shot. (00:12:21)
Continuity mistake: After Lilo's house explodes, she stumbles and falls. The position of the roof behind her changes, plus a spoon and leaves suddenly appear next to her between shots.
Continuity mistake: After Lilo's house is destroyed and she runs away with Pleakley, the damage suddenly diminishes noticeably between back and front shots.
Continuity mistake: When Lilo tries to teach Stitch to fetch, the wagon changes position between shots.
Continuity mistake: At the animal shelter, when the clerk tries to talk Lilo out of adopting Stitch, Nani's arm is very close to Stitch's tummy. A shot later, it's awkwardly twisted around and stretches out from a low place; and yet a shot later, it disappears, only to - drumroll - reappear immediately after.
Continuity mistake: When Nani, Lilo, and the clerk are at the shelter, the posters next to the lift door disappear.
Continuity mistake: When Stitch finds Lilo's family photo, it lays right next to the top sheets. When Lilo says, "That's us before," the sheets have moved further below.
Answer: No she opens the back door for Mr. Bubbles - you see him later open the front door that is still nailed shut.