iTunes splits my albums
When I import a multi-disc album into my iTunes library, I always take care to edit the info of all CDs and make all of them identical except the disc #. This makes sure that all discs of the album are correctly grouped as one album by iTunes.
I never have this problem when group CDs using the iTunes of my MacBook. However, problems occurs when I sync the library of my laptop with my iPhone. The multi-disc albums, which are correctly grouped on my laptop, are often split in my iPhone's music library. I have completely no idea of why this happens and how to solve this problem. Any suggestions?
iPhone 6, iOS 8.2