Hi,
For most I know it's a CSS problem with your template.
Because the address is in a popup, it uses the special "component.css" file of your template.
This special CSS file is used for popups, when there is not title/menus/etc but only the asked component.
You can add the parameter "?tmpl=component" (or "&tmpl=component" if there is already some parameters) too see the result with any Joomla page.
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.