TV Episodes which feature two different stories with separate cast lists

The true-crime series In Suspicious Circumstances https://www.imdb.com/title/tt0133021/reference/ consisted of episodes which each featured two separate stories; these had separate cast lists, one page of cast per story, headed by the relevant story name. https://www.imdb.com/title/tt1372349/reference/ is an example.

I presume these should be listed in IMDB as a single cast list, with all the cast in order for the first story, followed by all the cast in order for the second story, with the story name in parenthesis in the attribute field for each cast member "(segment 'Laugh Baby Laugh')" or "(segment 'Shadow of Doubt')".

However I notice that someone has listed separate episodes eg 3.1 is the combined story titles and 3.2 is the second story only. https://www.imdb.com/title/tt0133021/episodes/?season=3

Should this be rationalised by deleting all the "episodes" which list only the second story and cast list, and then renumbering the remaining episodes?

I've added cast-order numbers for 3.1 and 3.2, before I realised how IMDB was recording things. I'll correct things once I have a decision from the list managers as to how they want things to be listed.