Updater flags custom theme that doesn't match theme name at WordPress.org

We have a theme named smumagazine-staging. It is a child theme of iMagPress Premium Theme 1.0.4. This theme is on a WordPress Network.

For some reason, the updater flags smumagazine-staging as needing an update to version 0.3.2. This is impossible as there is no theme at WordPress.org with this name.

When I go to /wp-admin/network/themes.php and find this theme, the View version 0.3.2 details link takes me to ​https://wordpress.org/themes/magazine/, which is a child theme of the Omega theme.

Here's the complete style.css from our smumagazine-staging theme:

/*

Theme Name: smumagazine-staging
Template: imagpress-themes
*/

@import url("/wp-content/themes/imagpress-themes/style.css");


body #sidebar ul.kebo-tweets, body #widgets ul.kebo-tweets {
    padding: 20px !important;
}