Multiple taxonomy views do not work
Boy this is a big one. Got solution with Commerce Search API, simply re-created Kickstart's Collection view and got same result. View looks like this now:


As you can see it all runs in one Display only. Each taxonomy term menu link generates a view display for its category term listing product display nodes rendered via entities.

Also following this Commerce Search API video tutorial really helped to understand the basics how it works: http://vimeo.com/53404289