For consistency, use your URL shortener whenever possible, rather than mixing your own custom domain with other generic ones. I could probably go on and on with a dozen more URL shorteners, but lets be honest, you only need one. With TinyURL, you can also make a smaller URL that will work for any page on your site.
Windows also includes the same heuristic link tracking with some added improvements for searching name spaces to yield results in some common scenarios. See if you are using Classic Analytics (ga.js) or Universal Analytics (analytics.js).