This person was obviously added by mistake. I guess he was credited with the simplified form of 強 as sound recordist in "The Wrongly Accused Lover" (1951), and then looked up by the standard search box which does not find simplified characters (unlike UTF-8 search):
https://hkmdb.com/db/people/view.mhtml? ... ay_set=eng

I already replaced the sound recordist with Kwok Keung.

I already noticed that it's nothing uncommon simplified characters sometimes appear among traditional characters, especially 强/強, 双/雙 and 胆/膽。

Yes, traditional characters are encoded in Big5 and traditional character searches use Big5. So whenever in doubt about people, do a utf-8 search as it eliminates some of the middleware bugs the search engine has with a few Big5 characters.

I am working to move film and company names off of Big5, and subsequently the entire site (particularly the main search engine). It's a rather daunting task...but it will be much nicer once complete.

double is now deleted, it was added this way because it was stolen from HKFA (錄音, 郭强) by Heinz