@bta489 said:

I noticed that 'Josh Robert Thompson' I added as a season regular for the later seasons is no longer there. Why is he now removed? He did appear in virtually every episode after season 6 or 7 and is properly credited (whenever there were credits shown). Is there a guideline against it that I somehow missed? Should he be added differently?

I'm not sure what the problem is? He is listed on IMDb as being in 443 episodes (in third behind Stevens & Ferguson). Maybe because it was as a 'voice actor' (the robot Geoff)?

https://en.wikipedia.org/wiki/The_Late_Late_Show_with_Craig_Ferguson#Geoff_Peterson