I thought that was needed as it was on everyone else's post title.
Nah, that's not how it works. The forums add that. I've suggested that they use BIG RED BLINKING text for that part but it wasn't well received. ;)
I think you mean this plugin.
https://wordpress.org/plugins/wordpress-ecommerce/
If you do mean that plugin then you can create a new topic in that plugin's dedicated sub-forum here.
http://wordpress.org/support/plugin/wordpress-ecommerce#postform
That'll improve the chances of the author seeing your question.