@Thefartydoctor I completely understand that, but I think that adventures "Original to television" - as the section states - should be counted separately to adventures "Original to audio", etc.
I believe it would solve a multitude of problems - albeit leaving a few glaring ones, if we were to consider "Original to..." as referring to the medium rather than the character. Hopefully that makes sense.
Obviously it would include a lot of repetition for characters who have appeared in multiple mediums - for example; Rose Tyler would appear in the "Multi-story" segment of all current mediums; television, audio, comic and prose. But it would be an easy way to see which companions haven't appeared in a certain medium - Bill Potts, and all of the current companions, would be glaringly absent from the "Original to audio..." segments.