The duplicate display of groups here on meta has now been fixed. It was caused by the Add groups to the /about page theme component which I have now removed.
The admin and moderator counts and proper hiding of admins was fixed in this PR:
https://github.com/discourse/discourse/pull/31272
I’m glad to see that this issue was noticed. We sometimes wonder how important it is to improve this area of Discourse because it is rather buried in the interface!