Changes to a configuration propagating to other configurations

I have an assembly that I am creating different configurations of in order to have separate BOM tables for different parts.  I have a default assembly config which is the full assembly without any changes.  I have made 3 other configs to exclude specific parts from the BOM as needed in each config.  I was able to exclude the appropriate parts from the first config and the second.  Now when I exclude parts from the third it also excludes those parts from the second as well and if I change the second it changes the third.  Why is it doing this and how do I fix it?

Thanks

Also, none of these configs are derived.

Now I'm having another problem.  None of my configurations can be configured separately.  Any change I make to one is made to all of them.  Maybe my problem is not with SolidWorks.

Message was edited by: John Zielasko

SolidworksConfigurations design Tables