iTunes Various Artists Issue

For best results with compilations you should also fill in the album artist as Various Artists, or whatever other single value might be appropriate, like Original London Cast for a musical.

Quite why this one is showing a specific artist when other compilations don't is one of those quirks of the Apple ecosystem that are hard to pin down. It may because multiple tracks are credited to that artist, even though there are more to another, and his isn't track 1, it might be that it was one of the first tracks transferred (because syncing isn't necessarily done in order).

tt2

Pretty sure the smaller one is reporting the size in Gibibytes (2^30) while the larger one showing the same size but in Gigabytes (10^9). 2^10 is 1024 vs. 10^3 which is 1000. For 1K the difference isn't much, but it gets more serious as you move up orders of magnitude. It explains why the old 160Gb iPod classic only had around 149Gib of storage. Which measure of a Gb is used varies by operating system and application.

tt2