Hi Jack,
I think this issue is the same as mentioned in this post: issues with mosaicing unwrap method / texturing style
In general, the application doesn’t know if the image is focused properly or not. It takes the image, which is most suitable for the area and in your case it is the unfocused one. The only way to make this better, is to disable such image for texturing. I am sorry, but there is no other option, yet. We are still working on the improvement of this feature.