We understand correctly for your problem.
All problem is caused by cache. Some cache such as hosting server cache can't be removed manually.
To be exactly, if you change the theme option panel, theme.css file will be generated again.
But hosting server cache will render the old theme.css file. In originally, hosting server cache time is one day or 12 hrs.
So you didn't see the changes directly.
To solve this problem, we added some php code on your child theme.
Now, if you change anything on theme option, you can see the changes directly.
Please check again on your end.
If you have any other problem, please let us know again without hesitation.
Best Regards, C-Themes