Family table instances

Hi,

we have a problem with family tables (Windchill 12.0 and Creo 7)

two different things happens:

1. new part - draw some generic model - make family table - save file - upload- checkin

2. new part - draw some generic model - save file - make family table - upload- checkin

in case 1 in the folder we find 1 generic file and all instance files (if we add new children we get new instance files)

in case 2 in the folder we find 1 generic file, no instances (if we add new children we get no instance files)

in both cases the instances are working and can be added to an assembly.

How can we make get rid of the differences - which behavior is the correct one?

do we need to worry about one of this behavior in terms of data loss?

in cas 2 if we go to attributes we see all instances.