Thats a good thing!
About that "brown again" some days ago: there is a brown strip between the blue water and the bright yellow sand. Why?
Because that is how rendering works. I could 'fix' it, but it would only introduce a bunch of new bugs.. I mean, there is no good fix. And this isn't really that big of a deal. Every tile that connects to different tile type will have a 'dirt' strip in between, because there is really no other way to make it look nice.
If I was to start rendering strips based on connecting tile, that would make load of new bugs, which would look lot worse..
"It's not a bug, it's a feature" - Elysian Shodows