Hi, SETENTIA Studios. Thanks for your report and sorry for the inconvenience.
I've spent some time checking what was happening, and realized that there's corners missing in two tiles.
Here's a image with the tiles working how it should:
This is just a modification of the tileset you sent, the fix is not in the Tileset Gen yet. I'll upload a new version tomorrow.
By the way, i was checking the HaxeFlixel source code, and saw that they managed to implement an auto tiling algorithm that uses a 64 tiles pieces. I'll add that type of tileset too, after check how the code works.