What version of Archicad are you using now?
As far as I know this was a problem with the version 13 library.
But in 14 and 15 I think they have added options so that the MVO can be used for global settings or individual objects can over-ride these settings and can be adjusted separately.
Barry.
One of the forum moderators.
Versions 6.5 to 27
Dell XPS- i7-6700 @ 3.4Ghz, 16GB ram, GeForce GTX 960 (2GB), Windows 10
Lenovo Thinkpad - i7-1270P 2.20 GHz, 32GB RAM, Nvidia T550, Windows 11