First, thank you for your patience. I am new to this and watching videos and reading documentation but come across questions I would probably be able to answer with more experience.
I have a couple of screenshots of the tiles I’m working with and the effects that occur. Perhaps there’s an easy answer to my question.
In the Terrain Editor, I selected the tiles as such for a grass to water transition, which is different than the 3x3 and 2x2 grid I saw in the video and other documentation. As you can see, there are 16 tiles plus 4 more.
Using this terrain produces this effect. Notice the misplaced tiles. I think I’m probably just not understanding the Terrain tool.
And thank you for the answer about using different tile size in the game logic than for the map. I’m fine with that, but just wanted confirmation that there wasn’t some easy way I didn’t know of in Tiled.