Hi,
Please update your HikaShop store with the latest package 2.2.2 (which is currently not in auto-update so you will have to download it manually in our website).
This release includes some fixes (listed in our change log) and some improvements in the checkout workflow. I think that this new release will fix your "accept terms" problem.
Otherwise, I will recommend you to put a relative path for your "continue shopping url" and not set an aboslute one (with http:// ). The current option won't work for external users who can't access to the local IP address currently set.
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.