Willy, MT is only supposed to subscribe to the open portfolios, plus any open charts. If you have Positions open, or Transactions view with open transactions, those would be subscribed as well. If you are getting a situation where the # of symbols subscribed does not seem to be right, please email me the settings + Log as well as a description of what is going on, and a screen shot if you can get it:
go to FILE / Export Settings.
Leave the checkboxes already checked, and also check LOG FILE.
Export, then email me the exported file please.