my big issue here is not being able to click on the buildings when selecting a building to add as a waypoint.....sometimes i can click it, but 99% fo the time it never highlights
You can use the important building panel on the right and maybe even the map to select a building, I have the same issue so that's how I deal with it.
I have a question of my own, is there an "overview trading routes" panel ? A way to see how many trading routes you have, and what do they do ? Also do you have to start over the trading route settings or can you just modify it like changing the numbers, stuff like that ?