Which share does an Agent use when it has 2 or more device labels for replication shares? (4261065)

If there are 2 replication shares configured and each share has a device label. 

Example:
[Dev_ReplA] : Label of Replication Share for site A
[Dev_ReplB] : Label of Replication Share for site B

Which share does a device try to use when it has both labels simultaneously?

The device will not  use any shares. but will get packages from K1000 server.

To make the device use a share, please review conditions for labeling [Dev_ReplA], [Dev_ReplB]  exclusively.