Weld Symbols are Moving

I have an .asm in Creo 4.0.  It has 75 weld features in the asm model and the weld symbols in the drawing are shown annotation symbols from the model .  I go to the model and change one weld from 1 sided to 2 sided.  When I go back to the drawing many of the weld symbols have moved in all the other views.  Does anyone have a clue why this is happening?  I have another asm with over 500 welds.  Gotta get this figured out.