Sitecore ECM how to track the same user's activities in different target audiences

Sitecore ECM how to track the same user's activities in different target
audiences

We are using Sitecore 6.5, and the Email Campaign Manager 1.3.3 rev.130212
is installed.
Currently, when i add a Sitecore user, for example 'UserA' to multiple
target audiences, lets say 'TargetAudience_A' and 'TargeAudience_B', after
I send out these two target audiences, 'UserA' clicks the link in the
email which comes from 'TargetAudience_A', then the link will bring user
to the site, user visits several pages, Sitecore Analytics will be able to
track 'UserA' VisitPageCount and Value, and creates the corresponding
campaign of 'TargetAudience_A' with that data.
When the user open the email send from 'TargetAudience_B' and clicks the
link, visits the site, NO campaign is created for 'TargetAudience_B' in
the database, I can see all the data should use to create a new campaign
for 'TargeAudience_B' is used to update campaign of 'TargetAudience_A'.
All the link in the sent email has been modified by Sitecore, the
corresponding campaign id is added, which make the link looks like
this:'httP:xx.domain.com/?ec_camp=xxxx&ec_as=xxxx'.
Seems Sitecore just adds a Id to the url, but not create a campaign for
the 'TargeAudience_B' with that Id.
I use this sql query to check the visits data:
Select * From Visits join Automations on Visits.CampaignId =
Automations.CampaignId
Where Automations.data = '{EmailTemplateId}'
the data column on Automations table is the email template id of the
target audience.
Does any one know how to track one user's activities for multiple
campaigns, is that possible to do? Or is this something which needs to be
fix by Sitecore?
Any help will be much much appreciated.
Thanks