Hi Wolfgang,
In this case it was strange, please see the picture. This item I've tried to copy each from the original file.
I just copy , not changed or adjusted anything yet. but the volumes were changed of each items also.
Then if the position of copy files too far from the original file, the volume will be changed more also.
I’m not sure my understanding is correct. If we check in 3 of them , original , copy 3 and copy 4 the volume are different .It will shows the message warning !!
Then I've tried to checked in the original , copy 1 and copy 2. It didn’t shows the message warning and I can release design for review also.