P3D v4 why doesn't the gp line up properly and make triangles ?

#1
I got some problems that I am willing to fixed so that i could process forward and finish this project.

as shown on the images everything appears normal in model converter x and sketchup but when i open the simulator and take a look at it from top it doesn't look right at all.

Texture wise there is no problem i know the fix i just couldnt be bothered to fix it before taking screenshots.

the best way i could explain my self is if i leave some screenshots here, thank you.
 

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