There are many places with such limits, these spring to mind…
In the UK we have 3 licence levels, 2 levels only allows operation with the UK and are not valid for CEPT with 1 that is CEPT standard. In the US, I think only Extra Class is CEPT and the other 3 levels are not CEPT. Australia has a Foundation licence that is Australia only. There are more.
We thought about have some database magic that would mean a summit could have say 2 refs (G/AA-001 & GW/BB-001) as it was on a border but internally be the same summit. You could activate it twice but only score once. It becomes difficult explaining to people why they only got points once. It becomes boring explaining several times a month why people only got points once. It also is a messy fix to a simple problem.
There is one summit now matter how many names the different countries give it. There is one summit no matter where you start climbing from.
One summit = one reference = problem solved.