What happens if you have 2 merchants and an offline customer:
 - the 1st is offline, but still accepts offline BT transactions
 - the 2nd is online and accepts offline BT tansactions

For example If I as a customer send a offline BT transaction to the 1st merchant (offline)
After I go to the 2nd merchant (online) and send him another BT offline transaction.

Now the 2nd merchant sends my signed BT transaction to the network BEFFORE the 1st merchant.
Will be the this transaction valid?
And what about the validity of the first offline transaction (sent to the 1st merchant)?