Hi
Plates should have an optional property "surface" as graitings have. There are plates available that have two different sides. Because there is not surface or side property for plates that can be used in modelling and numbering, Parts that are not identical because of their side orientation may get get detected as identical in numbering and get the same number.
User shave to use workarounds like weldmarks that may cause that identical plates because of their weldmark position do not get the same number......
BR,
Christian Blei