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What platform are you running Path of Building on?
Windows
What is the behaviour in-game?
It's not related to in-game
What is the behaviour in Path of Building?
Ctrl+v
Item has more DPS and phys dmg runes turned into skill dmg runes
How to reproduce the issue
Copy any item (quarterstaves as my example), place it into items > shared
PoB for PoE2 build code
https://pobb.in/B-iYfZBN_50L
Screenshots

Item on screen has 2002.6 DPS
same item in PoB
Check version
Check for duplicates
Check for support
What platform are you running Path of Building on?
Windows
What is the behaviour in-game?
It's not related to in-game
What is the behaviour in Path of Building?
How to reproduce the issue
Copy any item (quarterstaves as my example), place it into items > shared
PoB for PoE2 build code
Screenshots
same item in PoB