The panel says it successfully connects with my Adobe ID (hence my CC account) and it has been updating my stuff by the minute. But even if it would be showing just the favorited ones, or restrict itself to the ones in "MyLibrary", it still shows too much 'old themes' which I got rid of long time ago.
So do you really see separate libraries as in the Color Themes panels in other applications ?
This is all I get: Illustrator Help | Color Themes panel
Hi,
I ran on the same problem, which I noticed after the CC 2015 upgrade.
Issue: Color Themes not displaying swatches created in My Themes from color.adobe.com (which worked previously with CC 2014.
My workaround was to publish each of my old themes as they were set to private before. (Although private themes seems to work just fine before, it seems like they made changes? I don't know but it works now.)
(My Themes Tab-Swatch Name-Info-Under actions, Publish. Under Explore tab, it should show under My Published Themes. Refresh Color Themes in Ai Panel.)
Issue: Old deleted themes were shown under Color Themes Panel.
Again, I went to color.adobe.com, under Explore-My Published Themes, I deleted my old swatches and refreshed my Color Themes in Ai Panel.
I hope that helps, otherwise good luck.