I've been having much trouble with the PCB forward anytime I edit the schematic.  Any change at all rips up the part from the PCB throwing it outside the board outline. The next issue in this area is the splitting of schematics.  I searched the forums for an answer but the only one I found did not help.  I made a brand hew schematic, with two connectors and 11 resistors in a cascade pi arrangement,  with a pair of matching net labels approximately in the middle.  I did a PCB forward, and laid out all the components.  I then went back tot he schematic and cut and pasted the right half ( 1net label, 5 resistors & connector) onto the second page.  I then did another PCB forward and it lost all of the nets.  The nets were removed and then added.  See below.  In my more complicated schematics, it not only changed nets, but threw a whole bunch of parts outside the board outline.  What is the correct procedure for splitting a schematic into two or more sheets? This ripping up of parts also extend to library updates.  Unless I change the unique identifier by completely replacing the part, it should not move or rip up nets.  I should be able to suck a part into the library and then change the value and push it back into the schematic without ripping a part up.  It makes it difficult to update parts without messing up the PCB end. Bob