Yuen Tak and Douglas Kung...

Both Yuen Tak and Douglas Kung Cheung-Tak have aliases "Hung Cheung-Tak"! Even I'm not going to suggest they're the same person, but I'm wondering if some credits have been mis-assigned to Yuen Tak somewhere along the line?
If so, don't know how to identify where... does anybody recall adding Hung Cheung-Tak as an alias for Yuen Tak?
If so, don't know how to identify where... does anybody recall adding Hung Cheung-Tak as an alias for Yuen Tak?