is not the first time I read about this issue and something strange happen also to me. For example in Akeeba Backup Troubleshooting on point 3. Known Issues you can read:
"Sometimes Joomla! forgets to copy all files in a package. This usually happens when upgrading from Core to Professional or when there is a major update in the component. The only workaround is to install each component package twice."
Hope this can help Seblod Team on investigating and solving... :)
PS We have to note that something in Joomla! Updater is changed:
Important note regarding Joomla! updates
Admin Tools 2.5.7 and later no longer includes the Joomla! Updater feature and the Joomla! update icon notification plugin. They have been superseded by the core Joomla! Update component and icon notification plugin respectively, written by our team and donated to the Joomla! project. In order to see the Joomla! notification icon in your Joomla! control panel you must go to Extensions, Plugin Manager and enable the "Quick Icon - Joomla! Update Notification" plugin.