Newbie Alert

I'm doing my first experimenting with TTools at an airport I'm building. I want all of the planes that land there to be ones that I built to go together.
But here's the result of one of them landing there.

It's a taildragger, could that have an effect? Is that why it flipped?
I could certainly use some advice.
But here's the result of one of them landing there.

It's a taildragger, could that have an effect? Is that why it flipped?
I could certainly use some advice.