I just watched Jonathan Creek S4 (EAN 5-014503-157227) Ep1 (The Coonskin Cap), and the character Ted Parnevik is clearly a superintendent in the Metropolitan Police - he's wearing the insignia, and he's addressed as such. But DVDPro credits him as "Inspector Ted Parnevik", so I checked the closing credits, and he is indeed listed as an inspector, not a superintendent.

I assume the correct thing to do is to leave the DVDPro credits matching the episode credits, even though they're not consistent with the actual episode. Is that correct? Is there any way of indicating that the credits are wrong?

Thanks.

or you could even change it locally and lock it if you prefer... but yes... the online database must match the end credits as the rules tells us to do.