I would imagine everyone who has a DHD4000 has the problem.
4TV Interactive who provide the 14-day EPG are terrible at updating listings when new channels start or replace old channels. BBC Parliament's listings are currently on 305 rather than the channel itself since they went full-screen.
Apparently 4TV's email address doesn't work, or at least they don't respond to it.
You could try emailing ITV in the hope that they might put some pressure on 4TV to get it sorted, although you'd need to explain carefully that you're using the 4TV EPG rather than the standard Freeview 7-day one, or they'll probably just send you back a standard reply telling you to re-boot your box.