I had a thread last week but closed it when I thought that

I had a thread last week but closed it when I thought that I didn't have a work around. https://premium.wpmudev.org/forums/topic/is-there-a-css-editor-plugin-that-works#post-436699.

Not sure if I should post in it or open this new thread. Please advise for future reference.

I looked at this again and discovered what was messing the css up. I used a different css class for one of the declarations and had everything working correctly using MyCustomCSS instead of putting the custom css code in the theme editor. The problem now is it showed correctly in Chrome but did not in Firefox or IE. Chrome was the only browser that recognized the code when placed in MyCustomCSS.

Is this a plugin conflict or what else should I look at to make it work? I really hate to remove the themes that don't work well with MyCustomCSS.