In my office there is a double firedoor at least 8 feet high and on one side it locks with recessed locks top and bottom and the other door is on a closer, the lock at the top must stretch 3 feet i guess because its so high to reach the top but in that area there is then no fire seals.  Does that seem right?

If one of the leaves is locking in that fashion then it is usually there to give extra width for loading/moving of large items/furniture and not part of the required exit width. 

You can interrupt seals for ironmongery such as locks, etc but it should be for as little of the edge as possible.