Hi @henric,
Are you using Canvas cloud-hosted, or your own hosting environment? For me in the cloud environment, the name shown on the admin search page (your first screenshot) matches the first field on the course settings page. If you're suing a custom-hosted environment, it's possible someone tweaked a setting somewhere that's interfering. If you're using Instructure-hosted Canvas, I'd guess maybe a caching issue. The only other thing that I wonder about is if you're actually enrolled in the course and set a custom name for it on your dashboard. I don't think the admin page would pull the custom name, but it's worth a shot to ask.
-Chris
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