Question on Movie Log / Watched List

[Spitfrnd]

I am enjoying the new movie log and streamlined watched movie features. I have come across question for a possible additional feature and oddity in how the entries appear for individual titles in sets. I couldn't find a way to list a title from a set separately for the Sharpe Series so I added the correct separately released disks as rentals and edited them for the watched dates. Nonetheless, they still show up simply as the full Series set.

So the question is whether it is or would be possible to add watch data for separate disks in a set and if not, why doesn't adding a separate release disk show up as that disk?