Hi Megan, You are not alone in being puzzled by this. Here is what has happened. You have not lost your organic rankings - they have been subsumed in your blended/local ranking. If you look closely at your listing, you will most likely see how it is a blended listing. Some elements connect directly to your website - whereas others are going to 3rd party data, such as a Google+ Local page.
So, your previous organic strengths have helped you in attaining this highly desirable blended/local result. Way to go! In times past, it was common for dominant businesses to be able to achieve both a local pack listing and an organic one (or even a couple of organic ones) on the same page of the SERPs. This is no longer typical, and most businesses will have either a blended/local listing or an organic one - but not both.
Even if you were the only bathroom remodeler in Ann Arbor, chances are that you would get a blended/local listing for your business and that other spots on the page might be made up of a few of your citation sources (such as your Yelp profile) and that Google might pull in other stuff from further away (sometimes in really wonky ways such as showing an auto dealership for a search for a plant nursery!). It would be uncommon these days for you also to have internal local pages linked to from your site, beyond that blended/local listing. Not saying it never happens - it's just really uncommon.
You should feel really good about your achievements, and to make you feel a little better, check out Dr. Pete's super post on heatmap studies for local listings:
http://www.seomoz.org/blog/eyetracking-google-serps
In that post, you will see how eyes are often drawn to the local listings, rather than the organic ones. So, things are going well for you! Congratulations!