I am using Campaign and adding marketing list to the current created campaign. Now when the marketing list was created it ask where I want to add the marketing list
--Confirm Addition; Select where would you like to add this marketing list:
--To the campaign only.
--To the campaign and all undistributed campaign activities.
I selected the first option "To the campaign only" where I want to add the created marketing list, which has been selected to be added in the campaign only.
Now I have created a Campaign Activity in the current Campaign.
As soon as the Campaign Activity is created all the marketing list which were added to the Campaign are added to the Campaign Activity.

Now the question is when there is a confirmation for where the marketing list need to be added and the selection is made that it need to be added in the campaign only, then why it is getting updated in the Campaign Activity.

So if the confirmation is made then the marketing list should not be added to the campaigns activity created. Would like to get this issue checked and fixed in the upcoming releases so there is no escalation from other users.