Multisite – Avia-merged-style issue

Hello,

I have a multisite where I have a different child theme for each site. I was reviewing the sites and I noticed that styling that I had entered into the General Styling and Advanced styling for one child site is being reflected in another site.

Here are the site URLs.(see private content)

These are the areas that are using the wrong CSS.
1) The headings should not be #444444, but #FFFFFF.
2) The background color for the navigation should be red not black.
3) The text for “Our Race” and the date in the header should be blue not orange.

The one thing these have in common is the all the styles are located in the avia-merged-styles css. Yet, each site has its own css for the avia-merged-styles/

(see private content)

Any help in order to keep these the styles to their respective sites. I look forward to your reply.

Lucy