2011 - Subassemblies won't stay suppressed

I've been having several issues with SW2011.  I'm on service pack 1.0.

One problem that has been particularly annoying is that subassemblies and parts within assemblies do not stay suppressed.  I suppress items within the design tree but they do not stay suppressed, sometimes I can suppress them if there is a top level assembly and do it there.  Even if I do get them to suppress, then the next time I open the assembly.... there it is again!

The assemblies typically have multiple configurations with different items suppressed in each configuration.

Is this just a bug or am I possibly doing something wrong?  Has anyone else had this problem?

Thanks!

SolidworksAssemblies