Hi,
1. How are you trying to apply the ACL on the remote destination ? Are you using the bulk admin tool ? If yes I think you have a conflict. Judging by the error you get I suspect that the owner of the ACL is not the same user as the one that 'owns' the remote destination.
If this is the case can you try just creating an ACL and assigning to the RD manually (without BAT) ?
2. If we are talking about mobile connect then you can check the following.
Once you are talking with your remote destination try to register your CIPC. It normally shows has one red light on, next to the line indicating that the line is in use remotely. If you don't get that then I think you cannot move the call back to your CIPC.
In a normal scenario, you should be able to get the call back to your CIPC by just hanging up your remote destination.
Let me know if this helps,
Christos