User Profile Replication across Farms

Hi,

I am facing two issues.

1) Full Replication

I have set audience base on a user profile property. I used the below command and ran the tool from Farm A. Not only the user properties in Audence  A (Users belonging to Farm A) gets updated in Farm B, but also the user profiles in Audience B (Users belonging to Farm B) gets updated at the Farm B. My understanding was that the tool updates user profile properties belonging to a particular audience only.

I have configured audiences in both farms and configured "Trusted MySite Host Locations" in both farms.

get-spprofilepropertycollection –source http://FarmA | start-spprofileservicefullreplication -sourcehttp://FarmA -destinationhttp://FarmB–EnableInstrumentation -MaxNumberOfThreads 15 -DoSocialReplication

2) Incremental Replication

when the incremental replication is executed, the respective user profiles are not updated at the other farm. The command is as below:

$mycredential = Get-Credentialge

get-spprofilepropertycollection –source http://FarmA | start-spprofileserviceincrementalreplication -source http://FarmA -destination http://FarmB -EnableInstrumentation -Credential $mycredential

i get a message "Service has already been started"

Is something missing ?

Please advise !!