Overlapping character errors!

I’ve been working on my new story and I am having some difficulties with background characters! As you can see below, I have two characters having a conversation… I also have a few people walking past in the background, but the problem is the background characters is walking right over one character!!! It isn’t making much sense to me because I am using the background commands:

@whoever walks to back far left

Even with that the characters still end up in front of one of my characters.

If you have any answers or suggestions, please don’t hesitate to comment.

Are you also using layer commands?

Thank you so much!