I had been waiting bosnian to see if anyone had been in your situation re the IELTS and doesn't look like it.

Knowing how bureacracies can be, unfortunately I'd say you might have to be prepared to have the retest done.

You could try going with the existing results on the state nomination and I don't think there's too much of a fee with that one to risk but downside of the immigration application could be putting your application and fee in jeopardy if they do pull the application up and then do not allow you the time to re-sit.

I know $400 is bad enough especially when things are tight because of delays etc. but it's probably the safer way to go.