Leveling issue

Hi. I have a used Ender 5 Plus that I am yet to get to print properly and I am currently having a rather head scratching problem. At least it is head scratching to me.

At first look. it looks like one of the corners is just really off. I have done manual leveling, z_offset is configured then auto leveling gives that response.

One thing I do notice is that it seems to think that the y axis is 400mm instead of 350mm. Also, I am pretty sure the bed isn't as warped as in the image.

Edit: I had it "working" on saturday but while I was away from the printer it lost some steps along the way and started printing in the wrong location on the bed.

https://preview.redd.it/qj4v7445quuc1.png?width=398&format=png&auto=webp&s=c9da8b7530cdcbda94cbba9bed93456c0d361455