Thank you for taking the time to test and report issues in the Plugin Browser. Your attention to detail and kind feedback is very appreciated.
We are now launching the Plugin Browser on WordPress.com. There is still more work to be done in the future, such as adding the plugin screenshots, improving the data that we currently getting from the WordPress.org API, as well as making changes to Jetpack to allow plugin authors to restrict the plugins that we display. We will continue working on the Plugin Browser as well as the Plugin Management experience for all Jetpack Sites.