Hi,
Point 2 has been fixed in the last package (when Nicolas wrote his message).
The plugin is now using another trigger and, as long as you have an HikaShop module in your page, the plugin "cart notify" will be loaded and will be able to put the JS content.
So please be sure that you right have an HikaShop module in your page and clean your website cache.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.