I have a single page site (i.e. all the pages show on the front page) and I configured Jetpack-Sharing to show the buttons on pages and posts. Then, I put the [jpshare] shortcode on each of my pages and made sure that the Allow Sharing checkbox is checked.
But, the buttons do not show on the front page, they only show when I preview the page by itself. For it to appear on the front page, I have to configure Jetpack to show buttons on the front page too, but then, I get double the buttons, which is not what I want.
I assumed your shortcode would allow me to place the sharing buttons on any page, no matter what the Jetpack configuration settings are, but I guess it doesn't work this way, does it?