Those 2 systems, the Greou Eor and Plua Thoi are in the same Galactic Sector, Errant Marches.I think I'm going to have to stay confused.
So, someone reported a Neutron Star in Plua Thoi. You then found one on Greou Eor, which confirmed that Neutron Stars exist in the Errant Marches sector. So you got a Confirmation entry.
That's how the Codex works. It's not a personal log, it just records stuff that you've found as confirmation of that type of body in that sector.
Only one person can be the first to find that type of body in that sector, and they get the "reported" entry. Everyone else gets confirmation entries.
It's like a checklist of stuff, in each sector.