Themes not updating

For several months, I've been alerted that I should update the "Network" theme, and recently "Studio" theme as well. However, when I try to auto-update, I get an error informing:

"An error occurred while updating : The theme is at the latest version.."

However, from the screenshot one can see that the reported version is not the latest version for either.

Network Installed: 1.7.6 Latest: 1.7.7.1
Studio Installed: 2.1.5 Latest: 2.1.6

I haven't gotten around to updating either manually, but since I'm see in with two themes rather than one now, I thought it was worth mentioning.