Cast credits not permitting also-as attribute (Curb Your Enthusiasm)

Episode 5-10 of Curb Your Enthusiasm ("The End") includes a normal cast list and then a long list of people seen briefly in a clip montage near the end. One actor is in both lists, but his name is misspelled in the second list. I'm trying to get that information reflected in the imdb list, especially since I've previously seen the "also as" attribute both used and noted on the help page. But the update page keeps automatically rejecting the attribute, asking whether I want random others such as credit-only, archive-footage, etc. In previous examples I saw it used alongside a redundant "as", but it's rejected in that combination too. Help?

More details and screenshot links you might find useful are at a submission I have a related question about: 230919-213527-645000. I thought, even if I could eventually get the attributes figured out, it would be useful to provide more detail because the credit list is necessarily terse and can't quite capture the "montage" duality easily (at least not without also adding "in montage" to dozens of role names, as episode 6-08 did for a more modest list of 4), let alone the good spelling here/bad spelling there. That's been rejected for not meeting "contribution guidelines", although with no interactive feedback system it's impossible for me to guess what form would meet them, so I'd like to ask about that too. Is it possible to get this added as a goof (possibly under another category or reworded), or trivia perhaps? Or is that an unnecessary level of detail?