When we export double spread layout's final PDF in InDesign we face some problems like, cropmars not placing well, bleeding is not setting correctly, quality of images not good or psd images show black outlines...
To export a final PDF in InDesign you need to know these things..
Change it to High Quality PDF
Change Standard of PDF
Check on Crop Marks
Set bleed .118 each but don't set for inside, make it zero.
TO KNOW MORE WATCH THIS VIDEO TUTORIAL...