I do not have an explanation, although I have deployed this solution from 3 different Online organizations, and all of them deliver the 1.3 solution.
I will see if I can track down the issue, but in the meantime, have you tried deploying the solution from an Incognito browser session? You mentioned using different orgs and browsers, but if your browser has this template in it's cache, that may not matter. I would like to hear if you have the same issue using an Incognito session, which will bypass any cache you may have in any of your browser sessions. This is discussed here: Wikipedia: Bypass your cache.
I have also attached the 1.3 version of the solution in case you are unable to download the updated template.