Hi
yes it's the normal behaviour
Here, you deal with " BOM configuration management"
but first of all. What do you mean by part and BOM : CAD part and structure or WTpart and PLM Bill of material
Anyway.
Several solutions depending of level of tracking you want.
-for CAD or WTpart, today if you only work with "Set Sate". There's no solution. You can only work may be with 2 WTpart BOM revision level by using filters criteria : example LATEST RELEASED or LATEST INWORK (that will be quite the same than LATEST)
-for CAD or WTpart,you ccan create Baselines to fix a particular historic/milestone state of your structure/BOM
-for CAD or WTpart,if you use Promotion request to manage lifecycle states. you can use the embeded baseline. by not adding in the promotion request only the objects to promote, but all the strcture/BOM
-the last level of complexity, for WTpart. Using Change Managament and effectivities
