As someone else noted, Jaikoz is writing "Various Artists" to the Artist field for some multiple artist compilations. It is also writing disc 1 of 1 for all discs of multi-disc sets.
The Manual Correct results window shows all tracks of a release as 11 of 11 (or whatever the max track # for that release is). The proper values are written after selection. However, sometimes Jaikoz chooses another release, not corresponding to the radio button you clicked. Screenshots of this issue sent to support.