Echoing that, before Caroline enters the little door for the third time, that time in the daytime, she wears green in the real world, and the overall tone of the movie is darker, in case you hadn't noticed, the green coat she wears when her mother takes her to buy her school uniform, and the green cardigan dress she wears underneath it when she gets home, so it's clear that she didn't believe her neighbor's godawful words; the ladder hadn't been noted before, and it's answered by someone that it's the same ladder that Caroline ultimately needed the ladder to escape the spider's web, which I think is right.

This movie was watched as a child, and I reviewed it today, just in time to see your question, an adult's perspective is completely different from a child's, I watched it with my sister at the time, and I noticed that Caroline was particularly nervous when she wore the green dress, and now I can't find the same sense of horror that I felt back then. I found a detail quite interesting, there is a long shot when Caroline loses the key, the image inside the dead well is very close to the image of the section of the road behind the little door, I don't know if there is any significance, apart from that there is nothing else that violates it, it should be just a coincidence