It sounds like you did everything correctly but that just one minor detail is off. I hate it when that happens. Either way, I would have a fairly knowledgeable

It sounds like you did everything correctly but that just one minor detail is off. I hate it when that happens. Either way, I would have a fairly knowledgeable SEO colleague take a second look at it just to make sure nothing is missed. A month should be more than enough time but you can try setting up some new links (from new sources) to the new domain just to see if the issue is that the new site is just being really slow on getting indexed for some reason.