P3D v4 Airport design editor issue with ground polys

I am kindly asking for help regarding an issue I face in ADE and my simulator P3D V4. Basically, the airport ground texture ‘particularly sand’ in my simulator is not aligned with airport borders in ADE. How can I possibly keep the texture or the ground poly within the airport in ADE? Above are screenshots of the map of the airport in both ADE and P3D V4:
 

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