Complex sentence: Although "Watch Over You" was the third single, "Ties That Bind" was only released in the United Kingdom; therefore, "Watch Over You" was Alter Bridge's second worldwide single released from "Blackbird".
Split into simpler sentences: Although "Watch Over You" will be the third single, "Ties That Bind" was only released in the United Kingdom. Therefore, "Watch Over You" was Alter Bridge's second worldwide single released from "Blackbird".