Hmm. Did you place it with a scientist?
https://wiki.kerbalspaceprogram.com/wiki/Go-ob_ED_Monitor
There’s also a proximity thing with the solar panels and control station. That left monitor should be good, but maybe the right one is too far away?
I’ve never had parts duplicate, but it wouldn’t surprise me if you stumbled on some specific bug where that occurs.
All my pcs get names from sifl and olly show characters.