Hey B, lets just look at the one here, work thru this and not worry about anything else, 
O.K.??? when you said @watchthebear wrote:
The fork is locked and if i slowly nudge it, it eventually heads for the other banking pin. I guess it is something like a snap–it appears a force takes over
This is what is supposed to happen, with the force from the mainspring thru the train to the escape wheel, the pallets should lock the escape wheel tooth and you have to nudge back the other way to get it to snap back to the other banking pin and move to the next escape wheel tooth. Is this what is happening with this one watch we are talking about today????? William