It’s too late for my first suggestion, open the nests up before they start to lay so you can handle the problem if they start sleeping in the nests before they start to lay. I know what you did is often recommended on here but it’s one that I personally don’t agree with. What you are seeing is why.
That’s water under the bridge. You can only do something going forward from where you are now. They are creatures of habit. Once they get used to laying in a certain place they want to keep laying there. You have to break that habit.
Sometimes when they first start to lay, they just drop an egg wherever they happen to be. It’s like they don’t know what is happening. Once they learn to control it they will then start laying in the same place every day. It’s sometimes amazing how many get it right the first time.
Try putting fake eggs in the nests you want them to use. They tend to want to lay where other chickens are laying. I use golf balls but about any egg-shaped or sized thing will work.
Don’t leave any eggs in those nests any longer than you have to. That will just encourage others to lay there. If you’re not down there a lot, that can be difficult.
Disrupt where they are laying. They want to lay in a “safe” place. Make it appear less safe. Move things around or put something where they are laying so they have to move their nest. When I try that they usually just lay next to it but it is a passive way to try. Shadows will often make a place seem more secure. If you have shadows forming a “spot”, can you change the light to change the shadows? They normally like to lay in darker places (yeah, I know. Normally does not mean always). If it is a dark spot, can you set a light up to shine in there?
Set one of those nests where they are laying. Get them used to laying in one of them, then gradually move the nest to where you want it.
I made some of my nests so I could lock a chicken in there if I wished. When I can catch a hen on her nest on the floor instead of where I want her to lay, I catch her and lock her in the nest until she lays that egg. That normally takes a half hour but I had one that took 3 hours. When I’ve done this I’ve only had to do it once for most of them, but occasionally I have to do it two consecutive days.
I happened to be in the coop when a pullet was laying her second egg where she had laid her egg the day before. I went to grab her and lock her in a nest but she took off. That evidently frightened her enough that she started laying in a regular nest.
This is not always an easy thing to correct, especially when you are not at home a lot during the day. Hope you get something out of this that helps.
