So the effect you are describing is what we call Overriding - you can read about it in detail here: Overriding Symbol Properties
If I understand you correctly, you should be able to override the
Selection property in one of the instances of your Symbol but still update the text of the tabs in the Symbol and have that change reflected across all instances of the Symbol.
Just to be sure, when you override the
Selection property in a single instance of the Symbol, you should see this change in the Property Inspector:
The green color of the property indicates this property is overridden. The little green
x allows you to undo the override.
Symbols and overriding can get a little complex so would you like to review the help docs on overriding and get back to us if you continue to have issues? It may be easier to work through your specific case if we can see your project file so, if you need to follow up, would you download and email your .BMPR project file to email@example.com and we’ll be happy to take a look.