Improper Ilevel in logs?

This is my first time uploading logs; when looking at DPS comparison by ilevel, everyone in the raid is compared in the ilevel -1 - 1 bracket, which leads me to think the logs think my guild is all ilevel 0 for some reason. What steps can I take to prevent this in future logs?

Check this option in your WoW client:

I’ll be sure to do that; thank you very much