When our team gets the advanced publisher solicitation data, there's no mention of the series issue numbering, so we have no clue any of them are part of bigger overall series. The safe approach is just to list them as a stand alone issue and use the notes field to indicate the series issue number.
Preferably, we'd like to have them listed under 1 title. We'll need to back track and revisit these 2 titles get all the issue listed underneath and remove the stand alone titles. If anyone would like to assist with this by sending in Corrected Data submissions that would be appreciated.