Cisco Firewall :: ASA 5585 Running 8.4 - Asymmetric NAT Rule For Remote VPN?

We have several L2L tunnels with remote networks that access networks inside. I am using object-groups to define the networks, then using the same object-groups in the twice-nat so the networks are accessible. For example:
 
Remote Network - 192.168.1.0/24 defined as object "RemoteA"
Inside Subnet - 10.1.1.0/24 defined as object "LocalA"
 object-group network RemoteVPN
network-object object RemoteA
network-object object RemoteB
etc....etc..

[code]....
 
I receive the "Asymmetric NAT rules matched for forwared and reverse flows" error, inidcating Source of "RemoteA" IP and destination of "LocalA" IP. Typically this indicates a missing twice-nat; however they are in the object-groups that are a part of the twice-nat specified above. The only way I have been able to clear the errors is to create a new twice-nat using the individual subnet objects. If I do a "show nat object-group LocalVLANS detail", all the subnets are displayed accordingly.
 
I have many twice-nat statements using object-groups, and working for over a year now. I only started recently having issues with this error; and am concerned it is related to some cap on using object-groups in twice-nat.