UE4 coordinate system confusing

Sorry about the confusion, my bad. Your model is facing Y for some reason. I see what you mean now, what are you exporting it from? Some software has the coordinates system backwards, like Maya from what I heard (not a Maya guy myself). Most exporters allow you to fix up the coord system, though.

I guess my issue is more about why the
thumbnail disagrees with the scene.

I’ve been staring at the thumbnails for such a long time that I no longer notice that I guess.

edit: edited my post a bit to avoid confusion