I have all main repositories twice in my zypper/Yast repository configuration after fresh install. And they are all marked as active.
For example URL http://download.opensuse.org/slowroll/repo/oss is there twice, under only mildly different labels and ‘service’, whatever it is.
espinosa-asus:/home/espinosa # zypper lr -E
Repository priorities in effect: (See 'zypper lr -P' for details)
80 (raised priority) : 1 repository
99 (default priority) : 8 repositories
# | Alias | Name | Enabled | GPG Check | Refresh
---+-------------------------------+---------------------------------------+---------+-----------+--------
1 | NVIDIA:repo-non-free | repo-non-free | Yes | (r ) Yes | Yes
2 | download.opensuse.org-non-oss | Main Repository (NON-OSS) | Yes | (r ) Yes | Yes
3 | download.opensuse.org-oss | Main Repository (OSS) | Yes | (r ) Yes | Yes
4 | download.opensuse.org-oss_1 | Main Update Repository | Yes | (r ) Yes | Yes
6 | openSUSE:repo-non-oss | repo-non-oss | Yes | (r ) Yes | Yes
7 | openSUSE:repo-openh264 | repo-openh264 | Yes | (r ) Yes | Yes
8 | openSUSE:repo-oss | repo-oss | Yes | (r ) Yes | Yes
11 | openSUSE:update-slowroll | update-slowroll | Yes | (r ) Yes | Yes
13 | repo-openh264 | Open H.264 Codec (openSUSE Tumblewe-> | Yes | (r ) Yes | Yes
I can remove the debug and source repositories, but they are not enabled.