No, they are not.
Tonight there was a Steam maintenance and since then, many Ark players complained that they keep re-downloading S+ mod or can't see the server.
If this is your case:
1. Exit Ark
2. Unsubscribe S+: https://steamcommunity.com/sha…filedetails/?id=731604991
3. Remove it from your drive (open Steam folder and search for 731604991, remove this folder)
4. Subscribe to the mod again, open Steam and let it download
5. Launch Ark and check bottom-right corner if it's installing
6. When it's done, you should be able to see and join the server.