Tom: When you submit credits for a TV episode, you should normally start from the page for the episode, not from the person's name page.
The formatting of episode titles on IMDb is complex, and if you get any of the punctuation or spacing wrong, the software won't recognize the title. Example: "Aquarius" (2015) {Mother Nature's Son (#2.12)}
By contrast, if you start from the episode page, then you don't have to enter the episode title and you can just focus on getting the person's name right.