I have a SF form with two related business objects, a MaintenanceFormToolStrip for parent BO and a ThemedToolStrip for the child BO.  (See image attached)

When I click the "Add" button of the ThemedToolStrip to call the CustomersBuildingsAddressBO1.Add(), the MaintenanceFormToolStrip buttons state will change, like I would have clicked the "New" button in that toolstrip.

I was looking for all properties in those toolstrip controls and the BOs, but could not find any property that would may be causing that behavior.  The two BOs are just related, but they work independent of each other, only that I make sure there is a parent record before trying to add a child one.