G'day, first your link should be: https://jivinjari.com/locations/sample-location-2/
I just pulled down wp-ui (ouch, nasty!) and tested it locally. It didn't show the problems you're having. Looking at the page source, everything seems to be being loaded via SSL.
My guess is that the plugin is loading its stylesheet later on (a second time) over HTTP. I recommend you contact the plugin author and get them to help you out.
Alternatively, take a look at the Post UI Tabs plugin, which has much cleaner code and plays by the rules better. It still needs the SSL Insecure Content Fixer, but it works.
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