Using Clear Seam unwrapped my entire mesh again instead of the face i selected I had nearly completed unwrapping my uv map when i accidentally selected mark seams from islands.  Now when i try to go back and remove the seams it completely reworks the entire UV map.  

I go from this:



To this:



I am hoping someone can provide some guidance to help me remove the unwanted seams.

To help add some clarification, this is how i believe it is supposed to work:

First add some seams and unwrap.


Next to optimize the mesh add or remove seams:

but the uv stays the same until you unwrap again:


But if i add or remove a seam even a single seam on my mesh i end up with this:



Hope that clears things up a bit.

Thanks!
Solved!



Apparently this option appears in more than one place.  It turns out Live Unwrap was enabled in the options menu.  Turned it off and it started behaving like i wanted.  This option does look useful though.  Will have to remember it later if manually unwrapping uv's in the future.