Hi,
We have experienced similar and in my experience if the 7 locals slot in between say 3 and 4, these effectively become 3-{4,5,6,7,8,9,10}-11 so the natural rank 4 is really 11th.
The reason I say this is I have noticed results moving up out of the local listings, into the top few and then back down into the local. This has been across several companies in the past 6 months, mind you just for one industry.
In my experience the only additional pages which you can rank in addition to having a local listing, is a sub-page. Although we have seen a local listing and also organic homepage listing ranking as high as middle of the second page.
I hope this has been of some assistance, just my observations from our listings.