Check your corners. They are not correct base.
Thanks, you're right. I was lazy and used this:
Just to make it easier this is the initial border
ffff83c18001800180018001c003c003c003c003800180018001800183c1ffff
The correct code is:
ffffc3c38001800180018001c003c003c003c0038001800180018001c3c3ffff
I tested it, and it's still wrong

I won't update my screenshot for this.