Troy
When I ran into this, it was in IV9 as well. Whether I deleted the view, inserted a new one, even started a brand new IDW, the old colours came back. ONLY in the IDW, though, they were correct in the IPT, the IAM, and the IPN, just not in the IDW. I'm sorry to say it, but re-doing the whole friggin thing was the only out for me (re-creating the IPN and IDW).
But, for me, I was lucky. It only happened in with an assembly of a couply hundred parts. Only took me a day to redo this! (Sorry, I'm trying to be optimistic, but it ain't working...)