Multiple Destinations

I have a DestinationRule, as follows, which sets multiple destinations ,a slot is created for each destination. The process works fine for unique destinations but we have a situation where a user may have to receive multiple activities which he needs to complete before the process continues. K2 seems to remove any duplicate destination.

Any Ideas ?

e.g.
public void Main(ref DestinationRuleContext K2) {


SourceCode.K2Utilities.DSHelper oDSH = new SourceCode.K2Utilities.DSHelper(SourceCode.K2Utilities.DSHelper.DSHelperNewOptionsEnum.DefaultLDAPDomain);
System.DirectoryServices.DirectoryEntry oDEManager;
string sManager;
bool bAllTrue = true;
CDest1 oDest1 = new CDest1();
oDest1.Main(ref K2);
if (oDest1.IsSuccess == true) {
//== sendto
K2.Destinations.Add(DestinationType.User, "DEVUSER1");
K2.Destinations.Add(DestinationType.User, "DEVUSER1");
K2.Destinations.Add(DestinationType.User, "DEVUSER2");

if (bAllTrue == false) return;
}
}

// Destination Classes

private class CDest1 {
public bool IsSuccess = false;

public void Main(ref DestinationRuleContext K2) {
this.IsSuccess = true;
}

}

The user is required to complete very different actions within our custom application dependent on the ActivityInstance Datafields, therefore we MUST be able to allocate multiple ActivityInstances to the same user with different Datafield values.

On the same note, is there a way to manually remove a destination user? I'm doing an escalation to the manager - if the manager gets termed a new manager replaces the old manager and their email gets disabled.  Doing the Add allows me to add the new manager but I need to remove the old manager since the email is no longer valid. 

Thanks,

Vinny

I am facing the same problem now.. Did you get any clue?