CoreImprovements.xml issue

From what I've read in the modding forum, files with same names in mods folder have top priority over core files

This doesn't happen with CoreImprovements however, since as long as the core file exists I get double modifiers in-game (eg. unrest -5%, unrest -5%)

it seems that my modified file is ok (already checked for syntax) since renaming the core file game works fine and my modified entries show up in game normally

I prefer not to mess with core files (even renaming them is an issue for me) so, is there any solution to this?

thanks in advance