Ketchup
4s mini mustang
The same thing happens to me and I think it is because sketchup makes the file as a view of what you are seeing. You can see that your picture of sketchup and your file are the same, for example. This is why I am having trouble with sketchup too.So when I go to print it, it print side way like that destroying the build. In sketch up I download a power pods some one made and again this was side ways. But when ever I draw some thing in sketchup it come out straights. I am using sketchup 2018 (the newest version). Hopefully that made sense if not tell me what is confusing.